Every certificate on-chain. Immutable, non-replicable, permanently verifiable.
Crypto is the sixth and most innovative C in BGI's 6C diamond grading system. It represents the integration of blockchain technology with traditional diamond certification. Every BGI certificate generates a unique NFT digital credential with an on-chain cryptographic hash, creating an immutable record that can be verified by anyone, anywhere, at any time.
This innovation addresses one of the oldest challenges in the diamond industry: certificate fraud. Traditional paper certificates can be forged or altered. BGI's Crypto standard eliminates this risk by anchoring each certificate's data to the blockchain, where it becomes tamper-proof and permanently traceable.
When BGI issues a certificate, the grading data is hashed using cryptographic algorithms and recorded on the Ethereum sidechain. The certificate holder receives both a physical document and a digital NFT credential. Verification is simple: enter the certificate number or scan the NFT on bgi.xyz, and the system compares the on-chain hash in real time.
This process combines the convenience of digital verification with the security of decentralized blockchain storage. No central authority can alter the records, and the certificate remains verifiable even if BGI were to cease operations a permanent, trustless proof of authenticity.
BGI certificates are governed by smart contracts that enforce the verification logic automatically. These contracts are open-source and auditable, providing complete transparency into how certificates are issued, verified, and transferred. Each certificate's digital signature, timestamp, and grading data are permanently linked in an unbreakable cryptographic chain.
| Step | Action | Outcome |
|---|---|---|
| 1 | Certificate Issued | BGI grades the diamond and generates certificate data. |
| 2 | Hash Generated | Cryptographic hash created from certificate data. |
| 3 | On-chain Storage | Hash recorded on Ethereum sidechain. |
| 4 | NFT Minted | Unique NFT credential issued to certificate holder. |
| 5 | Lifetime Verification | Anyone can verify via bgi.xyz against on-chain hash. |
Last Updated: June 2026 · BGI 6C Diamond Standards™