Rapaport Magazine

Blockchain directory

Here are some of the companies offering traceability programs to improve diamond transparency.

By David Brough

Image: Shutterstock


The Russian miner has developed a diamond-tracing method that uses nanotechnology to mark both rough and polished diamonds. This non-invasive “nanomarking” is imprinted inside the atomic structure of the diamond’s crystal lattice, according to the company. In partnership with Chinese tech giant Tencent — which created WeChat — and blockchain company Everledger, Alrosa launched a WeChat mini-program that offers an e-commerce solution for Chinese retailers. The program lets consumers check a diamond’s characteristics and purchase a stone through the channel, ascertaining its ownership history via Everledger’s blockchain platform.

Dharmanandan Diamonds

This Mumbai-based manufacturer has partnered with Everledger to place its diamond-tracking data onto a blockchain platform. The collaboration marries two existing projects: Everledger’s diamond blockchain, which launched in 2015, and Dharmanandan’s Diamond Time-Lapse, a report that tracks a stone’s journey from rough to consumer.

Diamond Ancestry

Cofounded by former De Beers Group executive Jonathan Kendall, Diamond Ancestry is a third-party blockchain solution that provides a digital ledger for diamond genealogy, characteristics and ownership history. In addition, it can design and provide a non-fungible token (NFT) for each unique diamond, using grading report information as well as photos and videos.


The UK-based tech company operates on a private blockchain network where object details and processing events can be easily added. Doing so writes new information to the ledger in what is known as a “block.” Each new block contains a cryptographic hash, and because all records are connected by their hash value, they are immutable.


The Gemological Institute of America (GIA) is now using blockchain technology to deliver secure, digital diamond-grading reports. These offer the same grading analysis as the GIA Diamond Grading Report and Diamond Dossier services in a virtual format. Benefits include a permanent and secure record of grading results, easy access to a paperless grading report, and registration of the report to a customer’s email or phone number.


The Provenance Proof blockchain platform by family-owned Swiss firm House of Gübelin is the world’s first digital ledger for tracking colored gemstones, according to the company, which recently released a new user interface with streamlined functionality. The goal is to enable both retailers and end consumers to trace the history of individual gemstones. Provenance Proof records the journey of rubies, emeralds, sapphires and the full spectrum of colored gemstones as they progress along the supply chain from mine to shop. Every transaction adds another entry to the immutable blockchain created by Everledger.

HB Antwerp

A collaboration between diamond manufacturer HB Antwerp and tech firm Blockchain Solutions draws on blockchain technology to provide more security and transparency for traceability data. All key steps of the diamond’s history, from the mine to the final polished result, are recorded as an indestructible entry in a public blockchain.


IBM has partnered with a consortium of diamond and jewelry companies to create TrustChain. The platform tracks and authenticates diamonds, precious metals and jewelry from the mine to the retailer. TrustChain uses the advanced technology of IBM to improve global provenance data.


A leading innovator in diamond security, Opsydia uses immutable microscopic identifiers that form a physical link between a specific diamond and its grading report, blockchain record, or branded-jewelry origins. Using next-generation sub-surface laser techniques, Opsydia provides a secure and tamper-proof way of confirming a diamond’s identity and empowers all stages of the supply chain to protect the integrity of their diamonds.


Created by the De Beers Group, Tracr provides end-to-end diamond tracking. Its purpose is to enhance trust within the industry by ensuring the provenance, traceability and authenticity of natural diamonds. Tracr uses digital assets to connect the diamond value chain without interrupting or delaying business processes, storing the information in a blockchain ledger. Version 1 of Tracr ensures individual stone traceability for polished diamonds in excess of 30 points.

Article from the Rapaport Magazine - February 2022. To subscribe click here.

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Tags: David Brough