Natural & Lab Grown Diamond Buying Guide

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Buy Diamonds with Confidence at Tapper's Jewelry

Discover everything you need to know to confidently choose the perfect diamond. Whether you're beginning your search or narrowing down your options, our Diamond Buying Guide is designed to make every step clear and enjoyable.

Learn how the 4 Cs influence a diamond's beauty, explore the differences between natural and lab grown diamonds, understand how cut impacts sparkle, and discover the settings and styles that best complement your vision. Backed by decades of expertise, we're here to ensure your diamond is as meaningful as the moments it celebrates.

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THE TAPPER’S PROMISE

OUR FIRST “C” IS confidence

Tapper’s 6 Cs embody our commitment to you. Choosing the perfect diamond ring is one of the most significant decisions of your lifetime, both financially and emotionally. We believe every part of the experience should be exceptional.

Family-Owned Jewelry Store
Tapper’s is a multi-generational family-owned jeweler with nearly 50 years serving the Metro-Detroit community. We believe in spreading joy and celebrating life’s most precious moments.

The Most Beautiful Diamonds
All diamonds are assessed using light performance technology in our Diamond Lab to ensure that a Tapper’s diamond will sparkle above the rest.

Direct Diamond Importer
Tapper’s maintains involvement in the entire diamond process from mine to showroom. We cut out the middleman to offer you the most competitive prices by directly sourcing our diamonds.

110% Best Price Diamond Guarantee
We guarantee our loose diamond prices to be the best, anywhere. If, within 30 days, you find a better price for the same like-quality loose diamond with an equivalent laboratory-grading certificate, we will refund you 110% of the difference.

Largest Selection of Diamonds in Michigan
We are proud to offer the largest diamond selection of any independent jeweler in the state. Our buying power allows us to bring you an incredible selection at the best prices.

Satisfaction Guarantee
If you do not love your purchase, we will gladly return it for you within 30 days. If a special order was manufactured for you, restocking fees and restrictions may apply.

20% Off Wedding Bands
Enjoy 20% off your wedding band purchase when you purchase your complete engagement ring from Tapper’s.

Upgrade Program
Upgrade your natural Tapper’s diamond at any time and receive full value of your purchase towards another diamond at Tapper’s suggested retail price.*

0% Interest Financing Available
Tapper’s offers convenient 6, 12, and 60 months financing options.**

Diamond Education
Our diamond experts will provide you with a personalized education to help you select the best diamond for your preferences and budget.

Platinum Rewards Loyalty Program
Earn 2% back in Platinum Reward points to use on future Tapper’s purchases. Some restrictions may apply.

Complimentary Ring Sizing and Setting
Enjoy your first complimentary ring sizing and stone setting on your complete Tapper’s engagement ring.

Custom Design
Let our Jewelry Designers bring your dream to life. Our design experts are available at all locations to design your one-of-a-kind piece.

Master Craftsmen
Our highly skilled jewelers are on site to provide the highest quality of service and maintenance for your purchase.

Complimentary Appraisal
Receive a complimentary appraisal with your purchase completed by one of our GIA Graduate Gemologists.

Complimentary Cleaning and Inspection
Bring your Tapper’s engagement ring to any of our locations, at any time, and we will gladly clean and inspect your ring free of charge.

Community Minded
As a Michigan company, Tapper’s believes in its responsibility to take care of our local community. For every loose diamond purchased, Tapper’s keeps a family in Metro-Detroit warm. Over 70,000 coats have been donated since Tapper’s was founded.

Understanding the Rapaport Diamond Report

The Rapaport Diamond Report was created to estimate diamond prices and is used as a guideline only. These prices may be substantially higher or, in some rare cases, lower than the actual market value of a diamond. When the Rap Report is used as a selling tool, it depicts wholesale pricing, which can be misleading and lead to paying a premium price.

Regardless of Rapaport pricing, Tapper’s is confident that we provide the most competitive prices, which is why we continue to offer Tapper’s 110% Best Diamond Price Guarantee***. Please ask if you would like us to further explain the Rap Report.

Color: the D-to-Z scale and why colorless costs more

GIA grades color from D at the colorless top to Z at the light-yellow end, and the difference between two grades often comes down to a tint most buyers can't spot without a reference. To grade a stone, a gemologist compares it against masterstones, a set of diamonds of known color that serve as fixed benchmarks under controlled lighting. That comparison removes guesswork, since a lone diamond looks colorless to almost anyone until you place a whiter one beside it.

Price does not climb evenly across the scale. Colorless diamonds are the rarest, and GIA notes an especially large price leap at the top end. A D or E grade commands a premium far out of proportion to how much whiter it looks next to a G or H, which is why most engagement shoppers get better value in the near-colorless middle of the range.

Fluorescence complicates the picture, and it can help or hurt depending on the stone. Roughly 35% of gem diamonds glow under UV light, most often blue. In a faintly yellow diamond, blue fluorescence cancels the yellow and can make the stone look a grade whiter, which is a genuine bargain. In a colorless or near-colorless stone, strong fluorescence sometimes leaves a cloudy or oily cast that drops both the look and the value. Ask to see any fluorescent stone in daylight before you buy, because the grading report describes the effect but cannot show you how it reads to your eye.

Diamond Grade Scale

Color (D-to-Z scale)

Grade Range	Category	What You See
D, E, F	Colorless	No detectable color; the rarest and most expensive tier
G, H, I, J	Near colorless	Faint warmth only against a white background
K, L, M	Faint	A noticeable warm tint face-up
N - R	Very light	Clear yellow or brown cast
S - Z	Light	Obvious color throughout the stone

Clarity: reading inclusions from Flawless to Included

Clarity measures the internal inclusions and surface blemishes a diamond carries, and the GIA scale runs across 11 grades from Flawless (FL) down to Included (I3). The top of the scale narrows because so few diamonds reach the higher grades. Flawless stones show no inclusions or blemishes under 10-power magnification to a skilled grader, and they are so rare that most people in the jewelry trade spend an entire career without ever seeing one. Set your expectations around what actually exists in the market rather than around the abstract top of the chart.

The grade itself comes from five factors working together, not from a single flaw count. GIA weighs the size, number, position, nature, and color or relief of each clarity characteristic, and the relative weight of each shifts from stone to stone. An inclusion sitting directly under the table has far more visual impact than the same inclusion tucked off to the side, so two diamonds with identical inclusions can earn different grades based on placement alone.

Most buyers land in the middle of the scale, and that is a practical place to be. VS1 and VS2 stones hold inclusions that a grader needs magnification to find, and SI1 and SI2 stones often look clean to the naked eye even though the flaws are technically slight. Only at the Included tiers (I1, I2, I3) do inclusions become visible without magnification. A GIA Graduate Gemologist on staff at Tapper's can plot exactly where a stone's inclusions sit so you see what you are paying for.

Clarity

Grade	What it Means
FL	Flawless; no inclusions or blemishes at 10x magnification. So rare a jeweler may never see one
IF	Internally flawless; surface blemishes only
VVS1, VVS2	Very, very slightly included; inclusions hard for an expert to spot
VS1, VS2	Very slightly included; minor inclusions under magnification
SI1, SI2	Slightly included; inclusions clear under magnification, sometimes visible to the eye
I1, I2, I3	Included; inclusions visible to the unaided eye and may affect durability

Cut: the grade that moves price the most

Cut moves diamond price more than any other C because it controls how much a stone actually sparkles, and shoppers routinely underweight it. Two diamonds with identical color, clarity, and carat weight can look completely different once you tilt them under light. A poorly cut stone lets light leak out through the bottom, so it reads dark and lifeless even at a high carat weight. A well-proportioned stone returns that light to your eye, which is what makes a smaller, well-cut diamond outshine a larger, badly cut one.

GIA defines a well-cut diamond through three optical effects. Brightness is the white light the stone reflects back. Fire is the flashes of color you see as light splits into the spectrum. Scintillation is the play of light and dark areas as the diamond or the viewer moves. As a general rule from GIA, the higher the cut grade, the brighter the diamond, which is why cut grade tracks so closely with both appearance and price.

If you are buying a fancy shape, the cut grade on your report matters less than you might expect. GIA offers an overall cut grade only on round brilliant diamonds, and it has announced no near-term plan to grade cut on other shapes. AGS built the only scientifically vetted system for analyzing cut quality and light performance across shapes like princess, oval, and Asscher. For an oval or pear, then, a GIA report tells you nothing about cut, and you should judge proportions and light return in person. Tapper's GIA Graduate Gemologists evaluate every stone's cut directly, not just its paperwork.

Cut

Grade	What You See
Excellent	Maximum brightness, fire, and sparkle
Very Good	Strong light return; a small step down
Good	Reflects most light; acceptable to the eye
Fair	Noticeably duller
Poor	Light leaks out; the stone looks lifeless

Carat: why weight isn't the same as size or value

Carat measures a diamond's weight, not its face-up size, and it drives price on a curve that rises faster than the weight itself. One carat equals 0.2 grams, and each carat splits into 100 points, so a stone under a carat gets described in points (a 0.83-carat diamond is "eighty-three points"). Larger stones cost far more per carat because they occur much less often in nature. A single 1-carat diamond weighs the same as four quarter-carat stones, yet it sells for far more than those four combined (GIA).

Diamonds also carry a premium at "magic sizes" like half carat, three-quarter carat, and one carat, where demand clusters around round numbers. Crossing from 0.95 carats to 1.01 carats adds only six points of weight but can raise the price by up to 20% (GIA). You pay a steep surcharge for the "1-carat" label rather than for a stone that looks meaningfully bigger.

That gap gives you a practical lever. A 0.90-carat diamond sits just below the magic threshold, so it escapes the one-carat premium while looking nearly identical across a finger. Spending the savings on a higher cut grade often buys more visible sparkle than the extra points would. Weight tells you what a stone costs to reach a round number, and cut tells you how it will look once it's set.

BEAUTY & LIGHT Performance

WHY IS A TAPPER’S DIAMOND MORE BEAUTIFUL THAN THE REST?

Most jewelers and laboratories measure a diamond’s beauty by its outer proportions (cut grades). At Tapper’s, we go one step further to offer the world’s most beautiful diamonds by measuring light performance.

Why light performance matters

Light Performance measures how much a diamond reflects, refracts, and releases its inner beauty. It is determined by how well a diamond interacts with light, it’s light return, fire, scintillation, and optical symmetry. Tapper’s uses cutting-edge light performance technology to capture and record each individual diamond’s light performance. While clarity, cut, color,
and carat weight define the rarity of each diamond, light performance is the most accurate and comprehensive way to measure sparkle and beauty.

DIAMOND FLUORESCENCE

What is diamond fluorescence?

Diamond fluorescence, in its most simple form,
is the effect that ultraviolet (UV) light has on a diamond. When you stand under a blue light or ultraviolet light, sometimes you can see your whites get brighter or your teeth appear to glow.

This is the same effect the diamond has under the UV rays. On a GIA Diamond Grading Report, fluorescence refers to the strength, or intensity, of the diamond’s reaction to long-wave UV, which is an essential component of daylight. The light emitted lasts as long as the diamond is exposed to the ultraviolet source. GIA studies show that for the overwhelming majority of diamonds, the strength of fluorescence has no widely noticeable effect on appearance.

In the GIA Fluorescence Study, it was found that the average person could not make a distinction between a diamond with fluorescence and a diamond without. In many instances, observers prefer the appearance of diamonds that have medium to strong fluorescence. In rare cases, some diamonds with extremely strong fluorescence may appear hazy or oily; fewer than 0.2% of the fluorescent diamonds submitted to GIA exhibit this effect.

SOURCE: www.gia.edu

Diamond Ring Metal Color. White, Yellow and Rose Gold.

CHOOSE YOUR METAL

PLATINUM

Hypoallergenic metal
Extremely strong and dense
Contains almost 100% precious metal
Retains color

Gold

Allows choice of color
Available in 14K and 18K
Lighter weight metal
Less expensive and may require maintenance

TAPPER'S LAB GROWN DIAMONDS

BEAUTY

Lab grown diamonds offer the same fire, sparkle, and scintillation as natural diamonds.

VALUE

Lab grown diamonds offer a great value and are more affordable than comparable natural diamonds.

QUALITY

The physical, chemical, and optical properties of lab grown diamonds are identical to natural diamonds.

SELECTION

Lab grown diamonds are available at Tapper’s and come in a wide range of shapes and sizes.

WHAT ARE LAB GROWN DIAMONDS

Just like natural diamonds, lab grown diamonds are crystallized carbon. The major differences are how they are formed and how rare they are. While natural diamonds are formed over billions of years deep within the earth’s crust, lab grown diamonds are created using a technological process that duplicates the conditions inside the earth.

Lab grown diamonds consist of carbon atoms arranged in the same crystal structure as natural diamonds. Because they are made of the same material as natural diamonds, they exhibit the same physical chemical and optical properties. Using this technology, Tapper’s offers beautiful diamonds with the same sparkle and clarity as natural diamonds.

LAB GROWN Diamonds vs. Diamond Simulants

It is important to note the major distinction between lab grown diamonds and diamond simulants. Lab grown diamonds are not diamond simulants. Diamond simulants, such as cubic zirconia and moissanite, look similar to diamonds but are not true carbon crystals.

Simulants can be distinguished from natural or lab grown diamonds using only the naked eye. They do not have the same chemical or physical properties as natural diamonds and are significantly less durable.

	LAB GROWN DIAMONDS	NATURAL DIAMONDS
FORMATION	Grown in a laboratory from a natural diamond seed over several months. Constructed of carbonatom structures.	Formed under ground over billions of years. Constructed of carbon atom structures.
PRICE	For the same price of a natural diamond, lab grown diamonds are 30-40% larger.	Higher priced with greater residual value.
SIZE	Available in a wide range of shapes and carat weights.	Available in a wide range of shapes and carat weights.
GRADING	Often graded by a 3rd party laboratory.	Often graded by a 3rd party laboratory.
FANCY COLOR	Available in a wide range of fancy colors.	Available in a wide range of fancy colors.
ENDLESS OPTIONS	Available in rings, necklaces, bracelets, and earrings.	Available in rings, necklaces, bracelets, and earrings.
UPGRADE PROGRAM	Trade in/Trade up upgrade program is not currently available on Lab Grown Diamonds.	Trade in/Trade up upgrade program is available on natural diamonds.
TAPPER'S PROMISE	Eligible for Tapper's 110% Best Diamond Price Guarantee.	Eligible for Tapper's 110% Best Diamond Price Guarantee.

FANCY COLOR DIAMONDS

THE NATURE OF FANCY COLOR DIAMONDS

Tapper’s specializes in unique and rare fancy color diamonds. Our expertise for analyzing a natural color diamond to bring out its true color potential is a masterful skill resulting in decades of dedication, investment, education, and experience. We will help you find the perfect diamond and design the most exquisite piece.

Diamonds that fall off the D to Z color scale are called fancy color diamonds and exist in almost every color imaginable. While cut is the most critical factor in colorless diamonds, color is the most crucial aspect in fancy color diamonds. Hue, tone, and saturation constitute the three components of color
Unlike colorless diamonds, fancy color diamonds are not cut to maximize brilliance and sparkle.
They are cut to achieve the best color possible.

“Only ONE in 10,000 diamonds has a FANCY COLOR”

— GEMOLOGICAL INSTITUTE OF
AMERICA (GIA)

Frequently Asked Questions

A diamond grading report is a lab's independent assessment of a stone's quality, documenting its 4Cs. It differs from an appraisal, which estimates dollar value for insurance.
GIA built the 4Cs in the 1950s: Cut measures how well light returns as sparkle, Color runs D (colorless) to Z (light yellow), Clarity spans Flawless to Included, and Carat is weight, not size.
Cut moves price more than buyers expect, since it governs the brightness, fire, and scintillation you actually see.
GIA and AGS were the two leading labs, but AGS Laboratories stopped grading diamonds after GIA acquired its light-performance technology in 2022.
Tapper's verifies every stone with GIA Graduate Gemologists on staff, backs pricing with a 110% best price guarantee, and imports diamonds directly from mine to showroom.

GIA created the 4Cs system in the 1950s to give jewelers and buyers a standardized language for describing diamonds (Diamond Quality Factors). Before that, quality claims varied from one seller to the next with no shared benchmark. Cut, Color, Clarity, and Carat weight now anchor every reputable grading report, and each factor carries its own scale. The four factors work together rather than in isolation, and price reflects the combination. A large diamond with a poor cut can look duller and sell for less than a smaller, well-cut stone. Color and clarity both climb steeply in price at their top grades because high-grade stones are rare.

A diamond grading report is a document that describes a stone's exact characteristics, including the 4Cs, proportions, polish, fluorescence, and a plotted map of its inclusions. It differs from a certificate and an appraisal. According to Jewelers of America, a grading report is a subjective assessment offering a grade within a range of values, while a certificate claims to guarantee an exact grade. An appraisal estimates dollar value for insurance and should never substitute for a grading report.

GIA and AGS were both respected labs, but the question no longer describes a live choice. In 2022, GIA acquired AGS Laboratories' light-performance grading technology, and AGS Laboratories stopped grading diamonds as part of that deal. GIA now issues an AGS Ideal addendum that folds AGS's cut methodology into its own reports. If you hold an older AGS-certified stone, that report stays valid, and its grades remain trustworthy. For any new diamond, GIA is the standard to look for.

Cut affects price more than buyers expect, because cut controls how much light a diamond returns to the eye. A well-proportioned stone produces brightness, fire, and scintillation, while a poorly cut one leaks light through the bottom and looks dull even at a high color and clarity grade. Two diamonds of identical carat, color, and clarity can differ substantially in price when one grades Excellent and the other grades Fair. A higher cut grade also justifies a smaller carat weight, since a brilliant stone looks larger than its measurements suggest.

Buy from a jeweler that grades every stone in-house and sells it with an independent report. Tapper's staffs GIA Graduate Gemologists who verify each diamond before it reaches the showroom, so you see the report and the stone matched together. Tapper's also imports diamonds directly from source, cutting out the middleman markup that inflates retail prices, and backs pricing with a 110% best price guarantee. That combination gives you a certified stone, a documented grade, and a price you can check against the market.

A grading report is a lab's documented opinion of a diamond's properties, and it is not the same as a certificate or an appraisal. Buyers conflate the three constantly, which leads to bad purchases. A certificate implies a guarantee of exact grade or value. A grading report offers a grade within a range, since it reflects the judgment of the graders who examined the stone and the standards of that specific lab. An appraisal exists for insurance and after-purchase care, and it should never stand in for a grading report.
The report reads like a blueprint of the stone. On the document you get the 4Cs, the shape and proportions, polish and symmetry, any known treatments, and light performance factors such as brilliance, fire, scintillation, and fluorescence. Most reports also include a plotted diagram mapping the diamond's inclusions and blemishes, which lets you match the paper to the physical stone in front of you. Because grading is subjective, two labs can grade the same diamond a step apart, so the report tells you how one lab saw the stone on one day, not an absolute truth.
Before you trust any report, run three checks. First, confirm the lab is independent of the mines, suppliers, and retailers selling the stone, because a lab with a financial stake in the sale has a reason to grade generously. Second, look for a multi-grader process rather than a single opinion, since consensus grading reduces individual bias. Third, apply a price sanity check. A diamond priced far below what its stated grade should command usually signals a soft grade, a hidden treatment, or a report from a lab that inflates.
At Tapper's, GIA Graduate Gemologists on staff verify every stone against its report before it reaches the showroom, so the paper and the diamond actually agree. That verification is where a grading report earns its value. A report you never check against the stone is just a document, and a report confirmed by a trained gemologist is proof of what you are buying.

For any new diamond purchase, GIA is the answer, because AGS Laboratories no longer grades diamonds. In 2022, GIA acquired the light-performance grading technology that AGS had pioneered, and the AGS lab became a GIA research campus. AGS spent decades building its reputation on cut-quality analysis, so its exit closed a real chapter in diamond grading. You will not find a newly issued AGS report today, which means the old GIA-versus-AGS debate no longer describes a live choice.
GIA absorbed the AGS methodology rather than discarding it. GIA now issues an AGS Ideal addendum report that applies the same light-performance analysis AGS developed, so the science survived the acquisition even though the AGS name left the lab bench. If light performance matters to you, that addendum gives you the analysis buyers once sought from an AGS Platinum certificate, now under GIA's reporting.
An older AGS certificate on a stone already in the market still holds its value and meaning. AGSL used essentially the same color and clarity methodology as GIA, including master color comparison sets built to GIA standards. A pre-2022 AGS report remains a credible grading document, and the diamond it describes did not change grades when the lab closed. If you are buying a stone with an older AGS report, you can trust it, but you should still confirm the grades with a working lab or a GIA Graduate Gemologist.
Both labs earned that trust through years of consistent grading, which is why an AGS report still carries weight. Rapaport founder Martin Rapaport reported at the 2012 JCK show that AGS-certified diamonds traded at higher prices than GIA-certified stones on the RapNet network, while HRD and IGI reports traded lower (Whiteflash). In 2015, Rapaport banned EGL-affiliated labs from RapNet over extreme over-grading, a contrast that set GIA and AGS apart as the reliable pair. Read that history as the reason an old AGS report deserves your confidence, not as a reason to seek one out now.
For a stone you buy today, GIA is the practical standard, and the AGS Ideal addendum covers the light-performance depth that AGS once owned.

Before you pay for any diamond, confirm five things. Each one protects you from paying for a grade the stone doesn't have, or a markup the stone doesn't justify.
First, ask for the grading report and match it to the stone. A GIA report carries a unique report number you can verify against the diamond's laser inscription and GIA's own database. If a seller can't produce the report or the numbers don't match, walk away.
Second, have someone qualified confirm the grade in front of you. At Tapper's, GIA Graduate Gemologists on staff examine every stone we sell, so the grade on the paper reflects the diamond in your hand. A report is only as reliable as the person who can read it back to you. Every Tapper's purchase also includes a complimentary appraisal completed by one of those same GIA Graduate Gemologists, so you leave with a documented value alongside the grading report.
Third, sanity-check the price against the grade. A colorless, high-clarity, excellent-cut diamond priced far below the market usually signals a lab that over-grades or a stone with a problem the photos hide. Tapper's backs its pricing with a 110% best price guarantee, so if you find the same certified diamond for less elsewhere, you get the difference back and then some.
Fourth, understand where the stone came from. Tapper's imports diamonds directly from the source to the showroom, which removes the layers of middleman markup that inflate prices at retailers who buy through wholesalers. You pay for the diamond, not the chain of hands it passed through.
Fifth, ask about after-purchase care and updated reports. Grading standards recommend refreshing a report every five years, and you want a jeweler who will handle that rather than sell and disappear.
Confirm those five and you buy a certified diamond with your eyes open, not on faith.
Buying a certified diamond at Tapper's also carries a set of ownership benefits that extend past the sale. Every engagement ring purchase includes complimentary ring sizing and stone setting on the first fitting, along with complimentary cleaning and inspection at any Tapper's location, any time. Tapper's diamond experts provide personalized education to help match a stone to a buyer's preferences and budget, and the same in-house jewelry designers who consult on custom pieces are available at every location. A Platinum Rewards program returns 2% in points toward future purchases, and Tapper's master craftsmen handle service and maintenance on site rather than shipping pieces out. Purchases also carry a 30-day satisfaction guarantee, so a buyer who doesn't love the piece can return it, though restocking fees and restrictions can apply to manufactured special orders. Buyers who purchase a complete engagement ring get 20% off a matching wedding band, and the Upgrade Program lets a buyer trade a natural Tapper's diamond at any time for full purchase value toward another stone at Tapper's suggested retail price. Financing is available at 0% interest across 6, 12, and 60-month terms.

Tapper's is a family-owned jewelry chain serving metro Detroit and Michigan for almost five decades, with showrooms carrying one of the region's largest selections of high-end watches, fine jewelry, and bridal. GIA Graduate Gemologists on staff grade and verify every diamond, and the direct mine-to-showroom import model lets Tapper's back each stone with its 110% best price guarantee. As a Michigan company, Tapper's ties every loose diamond purchase to its local community, and has donated over 70,000 coats to families in Metro Detroit since it was founded.

Let us help tell your story

Our bridal experts are here to guide you every step of the way. From engagement rings to wedding bands, we’ll help you find pieces that feel like your love story.

Your Comments/Questions

*New diamond purchase must be at least 1.5 times the value of the original diamond purchase. See Sales Professional for additional details.

**Special terms apply to qualifying purchases with approved credit. Minimum monthly payments are required during the promotion (special terms) period. Interest will be charged to your account from the purchase date at the APR for Purchases if the purchase balance is not paid in full within the promotional period. Restrictions apply. See store for more details. This information is accurate as of 02/17/2026 and is subject to change.

***We guarantee our loose diamond prices to be the best, anywhere. If, within 30 days, you find a better price for the same like quality loose diamond with an equivalent laboratory-grading certificate, we will refund you 110% of the difference.

Michigan's Complete Diamond Buying Guide | Natural & Lab Grown Diamonds