Lab-Grown Diamonds: A Complete Guide to Their Clarity and Quality
Lab-grown diamonds are graded on exactly the same 4Cs scale as mined diamonds, and by the same independent labs (GIA and IGI). Because growers control the environment, lab-grown stones often reach high clarity grades (VS and above) at a fraction of the price of comparable mined diamonds — frequently 60–80% less. A well-chosen 1-carat lab-grown diamond in the VS/F range typically sells for roughly $1,000–$2,500 in the US, versus several times that for a mined equivalent.
Lab-grown diamonds are real diamonds. They share the identical carbon crystal structure, hardness and fire of mined stones — the only difference is origin. That makes clarity and quality the questions worth understanding before you buy. This guide explains how lab-grown diamonds are graded, what affects their clarity, and how to choose a stone that looks stunning and holds up beautifully.
How lab-grown diamonds are graded
Every reputable lab-grown diamond is assessed on the 4Cs: cut, color, clarity and carat weight. The same laboratories that certify mined diamonds — the GIA and IGI — also grade lab-grown stones, so the language on the report is familiar. If you are new to the 4Cs, our diamond education hub walks through each one in plain English.
Understanding clarity in lab-grown diamonds
Clarity measures the tiny internal features (inclusions) and surface marks (blemishes) in a diamond. The scale runs from Flawless (FL) down through Internally Flawless (IF), Very Very Slightly Included (VVS1–VVS2), Very Slightly Included (VS1–VS2), Slightly Included (SI1–SI2) and Included (I1–I3).
Lab-grown diamonds are produced by two methods — Chemical Vapor Deposition (CVD) and High Pressure High Temperature (HPHT) — and each leaves subtly different inclusion types. Instead of the mineral crystals found in mined stones, lab-grown diamonds may show faint metallic traces (more common in HPHT) or minute graphite or feather-like features (more common in CVD). Because growers can fine-tune temperature and pressure, high-clarity results are easier to achieve consistently.
- VVS and above: inclusions invisible without magnification — a premium choice
- VS1–VS2: excellent value, eye-clean, the sweet spot for most buyers
- SI1: often still eye-clean and budget-friendly, but inspect the report and image
- I1–I3: visible inclusions, generally best avoided for a center stone
Why lab-grown clarity is such good value
Because supply is not constrained the way mined diamonds are, you can move up the clarity and color scale without the steep price jumps. A 1-carat, VS-clarity, F-color lab-grown round often costs 60–80% less than a mined stone with the same specifications. That saving lets many couples choose a larger or higher-quality center stone — see how the numbers compare on our natural vs lab-grown price comparison.
Choosing a high-quality lab-grown diamond
Prioritize cut first — it drives the sparkle more than any other factor — then choose a clarity of VS2 or better and a color of G or above for a bright, white look. Always buy a stone with a GIA or IGI report, and view a real image where possible. You can explore certified options across our lab-grown engagement rings and the wider engagement ring collection.
Caring for your lab-grown diamond
Care is identical to a mined diamond: clean it regularly with mild soap and warm water, use a soft brush to lift oil and dust, and have the setting checked periodically. Treated well, your diamond will keep its brilliance for a lifetime.
Frequently asked questions
Do lab-grown diamonds have the same clarity grades as mined diamonds?
Yes. They are graded on the identical FL-to-I3 scale by the same laboratories, so a VS1 lab-grown diamond and a VS1 mined diamond describe the same level of clarity.
Are lab-grown diamonds a good investment?
They are an outstanding choice for beauty and value, but like most jewelry they are bought to be worn and enjoyed rather than resold at a profit. If resale value is your priority, that is worth weighing before you buy.
CVD or HPHT — does it matter for clarity?
For the finished look, no. Both methods can produce high-clarity, eye-clean diamonds. What matters is the graded result on the report, not the growth method used to get there.
New to the category? Start with our beginner’s guide to lab-grown diamonds and our guide to diamond clarity.
