What is the difference between BGI and GIA diamond certificates?

BGI adds Clara brilliance grading and Crypto blockchain encryption on top of the traditional 4Cs. Each certificate generates a unique NFT that cannot be replicated and is permanently verified on-chain.

How to verify BGI blockchain diamond certificates?

Enter the certificate number or NFT ID on the BGI official website. The system compares the on-chain hash and displays the verification result. All certificates are stored on Ethereum sidechain.

Does BGI offer gemology training?

Yes, BGI offers gem grading masterclasses, diamond appreciation and aesthetics courses, and blockchain technology training.

What is Clara Grade brilliance?

Clara is BGI's exclusive grading standard. Based on light interaction modeling and brilliance analysis, it classifies diamond brilliance intensity into 5 levels: Good, Very Good, Excellent, Exceptional, and Ultimate.

How does BGI NFT ensure non-replication?

Each BGI certificate generates a unique NFT digital credential. The certificate hash is uploaded to the blockchain, combined with smart contracts and digital signatures, forming an immutable cryptographic fingerprint that is globally unique and verifiable.

Blockchain Innovation · NFT Certificates

6C Defining Brilliance

BGI seamlessly integrates diamond grading with blockchain NFT technology. Every certificate is unique and immutable. Experience 6C standards + cryptographic trust, redefining gemstone authority.

Explore 6C Standards NFT Certificates

100%

Non-replicable certificates

On-chain

Permanent verification

Complete grading system

About BGI BIT Gemological Institute

BGI (BIT Gemological Institute) is headquartered in Shenzhen, China, and is the world's first gemological institution to adopt blockchain NFT technology for diamond grading certification. All grading results generate a unique NFT digital certificate, with hash values uploaded to the public blockchain, ensuring immutability and full traceability.

BGI's 6C standards add Clara brilliance grading and Crypto encryption on top of traditional 4Cs, bringing a higher dimension of trust to the diamond industry.

Blockchain NFT verification, impossible to forge
Exclusive 6C standards including Clara brilliance (1-5 levels) and Crypto encryption fingerprint
Real-time on-chain verification without third parties
GIA-compatible grading process

BGI Exclusive 6C Diamond Standards™

Building on traditional 4C, adding Clara (Brilliance) and Crypto (Blockchain) for more comprehensive diamond valuation.

BGI 6C Standards Official Definitions

Carat Weight: The weight of the diamond measured to 0.001ct, directly determining rarity. BGI uses high-precision equipment for authoritative measurement.
Color Grade: Colorless degree grading from D (completely colorless) to Z (faint yellow). Strict colorimeter and spectral analysis ensure professional reliability.
Clarity Grade: Purity grading from FL (flawless) to I3 (included). Identified under 10x magnification, precise to inclusion position and size.
Cut Grade: For round diamonds only. Evaluating brightness, fire, and sparkle from Excellent to Poor to maximize optical performance.
Clara Grade: BGI's innovation: Clara 1~5 levels representing Good, Very Good, Excellent, Exceptional, and Ultimate brilliance. Based on light interaction modeling.
Crypto: Each certificate generates NFT with hash on-chain, immutable. Digital signature + timestamp for global unique verification.

Carat Weight 克拉重量

Precision to 0.001ct International Standard

Carat weight directly determines rarity. BGI uses high-precision equipment for authoritative measurement data.

Color Grade 颜色等级

D (Colorless) → Z (Faint Yellow)

Strict colorimeter and spectral analysis to determine each diamond's colorless degree.

Clarity Grade 净度等级

FL → IF → VVS → VS → SI → I3

10x magnification identifies inclusions with precision to position and size.

Cut Grade 切工等级

Round diamonds only · Excellent ~ Poor

Evaluating brightness, fire, and sparkle to maximize optical performance.

Clara Grade 璀璨度

Exclusive light performance grading

Clara 5 Ultimate Clara 4 Exceptional Clara 3 Excellent Clara 2 Very Good Clara 1 Good

Defining diamond brilliance intensity through light interaction modeling.

Crypto 加密存证

Blockchain · Immutable

Each certificate hash on-chain, NFT certificate with digital signature + timestamp for global unique verification.

Professional Education & Training

From gemology to blockchain technology, BGI offers comprehensive industry empowerment programs

Gem Grading Masterclass

Diamond grading, colored gemstone identification, hands-on laboratory practice. Obtain BGI certified appraiser credentials.

View Courses →

Diamond Appreciation & Aesthetics

High-level diamond appreciation, antique jewelry arts, fire grading practice to enhance aesthetic and collection knowledge.

Appreciation Salon

Blockchain Technology Training

NFT minting, smart contracts, digital certificate applications—cutting-edge courses bridging traditional jewelry and Web3.

On-chain Training

⚡ BGI NFT Digital Certificate ⚡

Every grading result generates a unique cryptographic credential, permanently stored on the blockchain

BGI Blockchain Certificate

NFT #BGI-1024

Carat Weight 1.52 ct

Color D (Colorless)

Clarity IF

Cut Excellent

Clara Grade Ultimate (Clara 5)

Crypto Fingerprint On-chain encrypted

Smart Contract Address

0x7fE3...b9cA2D

Certificate Hash

0x71dF9c8aB3eF4d2a1b5c7e9f0...8a3b

Scan for complete on-chain record

Blockchain Verification System

Enter certificate number or NFT ID to verify authenticity and on-chain status

All BGI certificates are stored on Ethereum sidechain, immutable and globally unique. Try any BGI number to experience verification.

About BGI

BGI (BIT Gemological Institute) is a globally leading blockchain diamond grading institution, dedicated to perfectly integrating traditional gemological craftsmanship with modern blockchain technology.

We believe every diamond carries unique value and story. Through NFT certificate technology, we ensure these values are authentically recorded and never lost.

GIA-standard grading process

Blockchain anti-counterfeiting traceability

NFT digital certificates globally accepted

Professional grading team

Industry Data

50K+

Annual Grading

99.9%

Accuracy

30+

Countries