Diamond Science & Certification
Everything you need to know before you buy — the science of how lab diamonds grow, how GIA certifies them, what the 4Cs really mean, and why they are physically identical to mined stones.
Side by Side
The science is unambiguous. The only difference is origin and price.
The cubic crystal lattice of diamond — pure carbon in a tetrahedral arrangement — is physically identical whether formed deep in the earth over billions of years or in a laboratory over weeks.
GIA Grading System
The universal language of diamond quality, developed by GIA. Every certified stone — lab or mined — is graded by these four criteria.
Cut is the most important of the 4Cs — it determines how brilliantly light performs in your diamond. A well-cut stone will outshine a poorly-cut stone of higher colour or clarity every time. GIA grades cut on five levels for round brilliant diamonds.
All Grown Lab Diamond stones are Excellent or Very Good cut. Cut grade applies to round brilliants; fancy shapes are graded on Polish and Symmetry.
GIA grades diamond colour on a D–Z scale. D is completely colourless — the most desirable and rare. Colour differences between grades are subtle to the naked eye, but GIA-trained gemologists measure them under controlled lighting.
Our lab diamonds typically achieve D–F (colourless) grades. CVD growth often produces Type IIa stones — the purest category, also attained by the world's most famous natural diamonds.
Clarity refers to the presence of internal inclusions or external blemishes. GIA grades clarity across 11 grades using 10× magnification. Flawless (FL) stones are exceptionally rare. VS1–VS2 inclusions are invisible to the naked eye.
Carat is the unit of weight for diamonds. One carat equals exactly 0.2 grams, divided into 100 points. A 0.50ct diamond is a "50-pointer." While carat affects price significantly, cut quality determines how large a stone appears.
Lab-grown diamonds allow you to buy a significantly larger stone at the same budget as a mined diamond — without any compromise in quality or certification.
Two Methods, One Diamond
Both methods produce genuine, certifiable diamonds. Each has distinct characteristics that affect which stones we recommend for which rings.
Plasma Chamber Growth
Earth Simulation Growth
Independent Certification
Every Grown Lab Diamond stone is independently graded by GIA or IGI. Your certificate travels with your ring — a permanent record of your stone's exact quality.
GIA (Gemological Institute of America) began issuing Lab-Grown Diamond Grading Reports in 2019. The report uses the same 4Cs grading scales as natural diamonds — colour, clarity, cut, and carat weight — so you can directly compare quality across stones.
The report is issued after the stone is examined by multiple GIA-trained gemologists under controlled laboratory conditions. It is completely independent — GIA has no commercial relationship with the seller.
Each GIA lab-grown report carries a unique report number that is also laser-inscribed on the stone's girdle, along with the words "LABORATORY GROWN". This makes the stone permanently identifiable.
* Representative sample report. Each stone you purchase comes with its own original GIA or IGI certificate with unique report number matching your specific diamond.
Your Certificate Explained
When your ring arrives, here is exactly what to look for on your certificate — and how to verify it is authentic.
Every GIA report carries a unique numeric report number. This same number is laser-inscribed on your diamond's girdle. Check that the number on your certificate matches the inscription on your stone — they must be identical.
Verify at gia.edu/report-checkGIA lab-grown reports are distinguished by a teal/blue colour scheme and carry the explicit notation "LABORATORY GROWN." The stone's girdle inscription also includes this text. This is mandatory — any authentic lab-grown GIA report will carry this.
Teal colour scheme = lab-grown reportThe report states the shape (e.g. Round Brilliant, Oval, Emerald) and exact measurements in millimetres. For round stones: minimum diameter – maximum diameter × depth. Verify these match your stone to confirm it is the certified stone.
E.g. 6.49–6.52 × 4.00 mmThe four main grades — Carat Weight, Colour Grade, Clarity Grade, and Cut Grade — appear prominently. A colour scale bar and clarity plot are also included, showing exactly where on each scale your stone falls and where inclusions are located.
D colour · VVS1 clarity = exceptionalAdditional quality grades appear below the 4Cs. Polish and Symmetry should ideally be Excellent or Very Good. Fluorescence is noted — None is most neutral. Strong blue fluorescence can sometimes make a stone appear milky in UV-rich lighting.
Excellent / Excellent / None = idealEvery GIA report includes a QR code that links directly to GIA's Report Check database. Scan it or visit gia.edu/report-check and enter your report number to verify the report is genuine and matches the details on your certificate.
Takes under 30 seconds to verifyFrom Seed to Setting
Six to twelve weeks of precision science, then months of craftsmanship — before the ring reaches your hands.
A tiny diamond seed crystal — pure carbon — is placed in a precision CVD chamber or HPHT press. This seed determines the crystal's orientation and growth axis.
Over 6–12 weeks (CVD) or 3–4 weeks (HPHT), carbon atoms bond layer by layer into a perfect cubic crystal lattice — the same structure as a natural diamond formed over billions of years.
Master cutters analyse the rough crystal for maximum brilliance. Each stone is cut to precise proportions and polished to an Excellent finish, then laser-inscribed with its GIA or IGI report number.
The stone is submitted — anonymously — to GIA or IGI. Multiple independent gemologists grade it, the report is issued, and the certificate is matched to the stone. This process takes 2–4 weeks.
The Science of Better
Real diamonds, created with technology instead of mining. Identical in every way that matters.
Pure carbon in a cubic crystal structure. Same Mohs hardness of 10, same refractive index of 2.417, same thermal conductivity. GIA themselves state that lab-grown diamonds are diamonds — not simulants, not imitations.
100%Identical carbon structureWithout the mining supply chain — no geological surveys, no extraction equipment, no complex international logistics — our diamonds cost 60–80% less than mined equivalents of the same certified quality. Your budget buys a dramatically better stone.
60–80%Lower than mined equivalentNo conflict zones. No environmental destruction. Complete origin traceability from seed crystal to certified stone. Every Grown Lab Diamond has a clean, fully documented origin — so your ring tells only a story of love.
ZeroConflict or mining impactCommon Questions
Now you know the science — explore our certified collection and find the perfect stone for your ring.