Register
A miner records a rough stone at its source and creates its permanent GemChain identity.
Public-chain provenance
Know where a gemstone has been. Verify who handled it.
One digital passport connects mining, custody, transformation and laboratory evidence across Ethereum, Aptos and Cardano.
No wallet is needed to verify public provenance.
Digital passport
VerifiedRough sapphire
Gem ID
0x73cf…398d0 Ethereum passport Aptos history Cardano certificate
See how verification works Network evidence
ConnectingReading the public ledgers
The connection retries automatically. You can keep browsing while it reconnects.
Choose your next step
What would you like to do?
Start with a public verification or continue into your role-specific workspace.
Verify a gemstoneCheck identity, provenance, certificates and cross-chain agreement.Register a gemstoneCreate a new passport as an approved Miner.Apply as a participantRequest a supply-chain role and submit supporting evidence.Issue a lab certificateCreate and manage laboratory certification records.Explore verified stonesBrowse gemstones with public passport information.
From origin to owner
How GemChain works
Four clear stages, each backed by evidence from a public chain.
Track
Custody changes, cutting, treatment and certification become ordered events in the stone’s history.
Certify
A laboratory issues a certificate that can be checked against the chain where it originated.
Verify & trade
A buyer checks the complete provenance and proof state before ownership changes.
Evidence, not promises
Understand exactly what “verified” means
Every state is labelled so you can distinguish confirmed evidence from pending work.
Cross-chain proof
Recompute the event hash and inclusion path instead of trusting a summary screen.
Independent certificates
Laboratory certificates originate on Cardano and retain their issuing-chain identity.
Role-gated history
Each event is accepted only from the participant role permitted to perform that action.
Check a stone before you trust its story.
Enter its GemChain ID to inspect provenance, certificates and chain agreement.
Verify a gem