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Global #1 Authority for Lab Grown Diamonds

IGI Diamond Certification.
The Global Standard for Lab Grown Diamonds.

The International Gemological Institute (IGI) is the world's foremost authority in lab grown diamond certification, grading more than 85% of all lab created diamonds globally. Learn how IGI's rigorous 4Cs evaluation, laser inscription security, and Type IIa scientific verification safeguard your diamond purchase.

How to Read IGI Report All Certification Labs
85%+ Global Market Share Micro-Laser Inscribed Girdle CVD / HPHT & Type IIa Certified
IGI Certified Lab Grown Diamond Grading Report
IGI Official Inscription
LABGROWN IGI LGXXXXXXXXX
Antwerp 1975
✦ The Industry Leader ✦

Why IGI Dominates Lab Grown Diamond Certification

Founded in Antwerp in 1975, IGI was the very first international gemological laboratory to embrace lab grown diamonds and establish precise, uncompromising grading standards for them.

Pioneered Lab Diamonds

While other institutions initially hesitated, IGI developed dedicated scientific equipment and testing protocols to accurately grade lab-grown diamonds as early as 2005.

Precise Cut Grading

IGI assigns specific cut grades—including the revered Ideal cut grade—not only to round diamonds but also provides full proportion breakdowns for fancy shapes.

Laser Inscription Standard

Every single IGI certified lab diamond carries the mandatory micro-laser inscription "LABGROWN IGI" along with its certificate number permanently engraved on the girdle.

Global Trading Liquidity

Retail jewelers and diamond wholesalers from New York to London and Hong Kong universally accept and price lab grown diamonds based on IGI grading certificates.

✦ Official IGI Gemological Framework ✦

The Diamond 4Cs: How IGI Evaluates Quality

According to the International Gemological Institute (IGI), the 4Cs—Cut, Color, Clarity, and Carat Weight—form the universal scientific language of diamonds. IGI applies this rigorous framework uniformly to both natural and laboratory-grown diamonds.

1st C • "Cut is King" Dictates Sparkle

Diamond Cut

While nature or laboratory growth dictates a diamond's color and clarity, human craftsmanship dictates its cut. IGI considers cut the most vital of the 4Cs because even a chemically flawless, colorless diamond will look dull and lifeless if cut improperly.

The Three Dynamics of IGI Light Performance:
Brilliance Total pure white light returned to the eye.
Fire Prismatic rainbow spectral flashes.
Scintillation Dynamic contrast flashes during movement.
IGI Cut Grading Scale:
IDEAL (Top Tier) EXCELLENT VERY GOOD GOOD FAIR POOR
*IGI's prestigious "Ideal" grade requires precise table percentages (54–57%), crown angles (34–35°), pavilion angles (40.6–41.0°), and razor-thin to medium girdles.
2nd C • Master Comparison Body Color Absence

Diamond Color

For white diamonds, color grading actually measures the absence of color. IGI evaluates each gemstone table-down under standardized, daylight-equivalent lighting against an internationally certified master set of control stones.

IGI Standard D-to-Z Spectrum:
  • D – E – F (Colorless): Completely free of body tint. Highest rarity and icy brilliance.
    Pinnacle
  • G – H – I – J (Near Colorless): Subtle warmth invisible to the untrained eye once set in jewelry.
    Sweet Spot
  • K through Z (Faint to Light Warmth): Noticeable yellow or brown undertones, graded for commercial tiers.
    Budget
Fancy Colored Diamonds:

Diamonds possessing intentional, saturated body color outside the Z scale (such as Pink, Blue, Canary Yellow, Green, and Red) are graded by IGI under specialized Fancy Color criteria: Faint, Very Light, Light, Fancy Light, Fancy, Fancy Intense, Fancy Vivid, and Fancy Deep.

3rd C • Microscopic Purity 10x Loupe Inspection

Diamond Clarity

Clarity evaluates a diamond’s relative freedom from internal features (called inclusions: pinpoint crystals, feathers, clouds) and surface characteristics (called blemishes: polish lines, scratches).

IGI Clarity Scale Breakdown:
FL / IF Flawless / Internally Flawless: No inclusions visible under 10x magnification. Extremely pure.
VVS1 – VVS2 Very Very Slightly Included: Minute inclusions extremely difficult for seasoned gemologists to see under 10x.
VS1 – VS2 Very Slightly Included: Minor inclusions difficult to somewhat easy to locate under 10x; 100% eye-clean.
SI1 – SI2 Slightly Included: Noticeable inclusions under 10x; typically eye-clean in SI1.
I1 – I2 – I3 Included: Obvious inclusions visible to the naked human eye that affect transparency.
Inclusion Plotting: IGI reports for larger solitaires include a detailed plotted diagram mapping the exact location, shape, and type of inclusions as a unique fingerprint.
4th C • Precision Measurement 1 ct = 0.200 grams

Carat Weight & Spread

Carat refers strictly to a diamond's weight, not its visual size. One carat equals 200 milligrams (0.2 grams), subdivided into 100 points (e.g. a 0.75-carat stone is 75 points). IGI measures diamond weight to the thousandth of a carat using electronic micro-balances.

The "Carat Weight vs Spread" Factor:

Two diamonds of the exact same 2.00-carat weight can have significantly different face-up visual sizes depending on how they were cut:

Deep Cut (Wasted Weight)

Weight is hidden in a bulky pavilion or thick girdle. Stone looks smaller (e.g., 7.8mm) and leaks light through the bottom.

IGI Ideal Cut (Maximum Spread)

Optimal depth ratio (59–62.5%) gives full 8.15mm+ face-up diameter with 100% total internal light reflection.

New Origin Diamonds Standard: Every CVD diamond we synthesize in Surat is faceted specifically to achieve IGI Ideal/Excellent spread proportions, giving you the biggest visual diameter per carat.
Educational guidance derived from official IGI Consumer Education: Diamond 4Cs Standards .
✦ In-Depth Certificate Guide ✦

Understanding Your IGI Diamond Report

An IGI Laboratory Grown Diamond Report contains extensive gemological data. Here is what each section tells you about your gemstone:

1. Report Number & QR Code

Begins with "LG" (e.g. LG628475910). Scanning the QR code takes you directly to IGI's official online verification database.

2. Exact 4Cs Evaluation

Carat: Precise weight to 2 decimal places. Color: D through Z scale. Clarity: FL to I3 with plotted inclusion chart. Cut: Ideal, Excellent, Very Good, Good, Fair, Poor.

3. Proportion Breakdown

Provides key proportions essential for sparkle: Table %, Total Depth %, Crown Angle & Height, Pavilion Angle & Depth, and Girdle Thickness.

4. Growth Method & Type IIa Disclosure

The comments section explicitly notes whether the diamond was created by CVD or HPHT synthesis and confirms its Type IIa crystal purity.

IGI LABORATORY GROWN

DIAMOND REPORT

Report No. LG615482903
Description:
LABORATORY GROWN DIAMOND
Shape & Cut:
ROUND BRILLIANT
Measurements:
8.15 - 8.19 x 5.04 mm
Carat Weight:
2.06 CARAT
Color Grade:
E
Clarity Grade:
VVS2
Cut Grade:
IDEAL
Polish / Symmetry:
EXCELLENT / EXCELLENT
Fluorescence:
NONE
Laser Inscription:
LABGROWN IGI LG615482903
Comments: This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment. Type IIa.
✦ Expert Laboratory Comparison ✦

IGI vs. GIA: Which Should You Choose?

While GIA remains the historical king of mined diamonds, IGI is the gold standard for lab grown diamonds. Here is how they compare side-by-side:

Comparison Point IGI (International Gemological Institute) GIA (Gemological Institute of America)
Lab-Grown Market Share ~85% - 90% Worldwide ~5% - 10% Worldwide
Cut Grading Assigns "Ideal" cut grade + proportion diagrams Assigns "Excellent" top cut grade
Report Availability Physical paper certificate + digital QR verification Digital-only dossier (PDF) for lab diamonds
Turnaround & Cost Fast & cost-effective (savings passed to buyer) Higher lab fee & longer submission wait times
Wholesale Trade Liquidity Universal benchmark used by all major manufacturers Selective inventory, slight brand premium for certificate

Verdict: For lab grown diamonds, an IGI certificate provides identical peace of mind, full 4Cs disclosures, and maximum dollar value without paying an unnecessary markup for laboratory paperwork.

✦ Direct Surat Manufacturer ✦

Fresh From Our Surat Chambers to IGI Laboratories

New Origin Diamonds manufactures pure Type IIa CVD diamonds in our Surat facilities and submits them directly to IGI’s accredited laboratory in Surat and Mumbai for impartial grading.

100% Impartial Third-Party
Zero Retail Markups
Micro-Laser Inscribed Girdle
Worldwide Insured Delivery
WhatsApp Live Desk

How to Verify Any IGI Diamond in Seconds

Follow these simple steps to confirm your diamond's certificate online:

1
Visit IGI Official Website

Navigate to igi.org/verify-your-report.

2
Enter Certificate Number

Type your report number (e.g. LG623489102) into the search field.

3
Instant PDF & Specification Match

Download the official PDF grading report and verify the carat, cut, color, clarity, and measurements.

Open IGI Official Report Check
✦ Clear Insights ✦

Frequently Asked Questions About IGI Certification

Yes, 100%. IGI confirms that lab grown diamonds have the exact same chemical composition (carbon), crystal structure, Mohs 10 hardness, and optical refractive index (2.42) as mined diamonds.

IGI's "Ideal" cut grade is the highest attainable grade for proportions, symmetry, and light performance. An Ideal cut diamond reflects nearly 100% of light entering the crown back to the viewer's eye, producing maximum fire and brilliance.

IGI embraced lab grown diamonds early, providing comprehensive full 4Cs grading, physical paper reports, and fast turnaround when other institutions refused. This established IGI as the standard trading currency in the global lab grown diamond supply chain.
✦ Direct Surat Manufacturer • B2B & Bespoke ✦

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