Associate Editor Lauren McLemore headed out West for a visit to Potentate Mining’s operation hosted by gemstone wholesaler Parlé Gems.
Gübelin’s Blockchain for Gems Now Open to the Industry
The Swiss gem lab’s Provenance Proof technology debuted during AGTA GemFair.

The Swiss gem lab launched its Provenance Proof Blockchain during AGTA GemFair, officially opening its use to the trade.
Now, any professional stakeholder along the supply chain can register and, after a standard “Know your Customer” check, start using it.
It’s been a little more than a year since Gübelin announced it was developing the program to trace colored gemstones from mine to market, which it calls the first of its kind in the world.
The project comes as part of the lab’s Provenance Proof initiative, a long-term program designed to develop and provide technologies to the gemstone industry to make it more transparent. It includes the lab’s “Emerald Paternity Test.”
Gübelin’s blockchain aims to track a stone as early in the supply chain as possible to build a record of each rough gemstone’s journey. The owner or custodian of the stone is then able to contribute certain information to the log book through to, and including, the end consumer.
Fura Gems was the mining pilot partner, offering goods at its Coscuez Colombian emerald mine as test subjects for the blockchain technology.
The Gübelin family shouldered the cost of developing the technology, which means it is free to use for anyone in the trade.
“The industry has been changing and consumers are now interested in transparency, and this was my main motivation … to support blockchain and this whole initiative because I think we need to change now,” Raphael Gübelin, president of the House of Gübelin, said in Tucson.
To help keep it inclusive, every process, including the registration and upload of the data, can be done on a smartphone.
Visibility is restricted to the user in custody of the gemstone, and only is allowed upstream—meaning the current users can see who had the gemstone before them but do not see where it goes once it leaves their possession—though Everledger CEO Leanne Kemp told National Jeweler during an interview after the launch event that it could be reversed to allow someone at the beginning of the chain to see subsequent actions should users give permission to do so.
Gübelin Gem Lab Managing Director Daniel Nyfeler also noted that the lab has no privileged insight into specific data of the blockchain; the lab itself can only see the information entered into the blockchain relating to the stones it is entrusted with testing.
WATCH: Gübelin Explains How the Blockchain Works
He said it also makes economic sense to embrace it; blockchain could offer greater visibility for companies along the supply chain and offer retailers the full information to build the story behind a stone.
Nyfeler, along with Kemp, Raphael Gübelin, Fura Gems Vice President Marketing and Sales Rupak Sen, and Pat Syvrud, minerals, materials and society program development manager at the University of Delaware, took part in a panel after presentations during the Tucson launch.
During the panel, Nyfeler addressed one of the biggest criticisms of blockchain—it does not have the ability to prevent a user from entering false data that then appears legitimate as it is locked into the blockchain.
“Blockchain is not the silver bullet that’s going to bring 100 percent trueness in the industry immediately, but … it’s going to be much easier to determine over time and see patterns, and you’re going to see where such wrong information might come from, which so far is not the case and that’s the point where we were starting from,” he said.
When an attendee also asked whether the small-scale miners would care about becoming a part of this, Nyfeler said it was up to the industry to encourage them to do so.
Looking to the future, he told National Jeweler that Provenance Proof, like De Beers’ Tracr, is a long-term venture that eventually will be spun off as its own company.
A supervisory board will be entrusted with making strategic decisions, such as data security and compliance issues, and will consist mostly of individuals independent of the gemstone industry “in order to minimize the risk of conflicting interests.”
And since certain segments of stakeholders will have specific needs related to the use of the blockchain, such as a large-scale miner or wholesaler wanting interfaces to allow for the automated upload or exchange of the company’s inventory system, Provenance Proof—not Gübelin Gem Lab—will oversee designing, building and implementing solutions to address these needs.
The Latest

Fordite is a man-made material created from the layers of dried enamel paint that dripped onto the floors of automotive factories.

Gilbertson has worked as a researcher, jeweler, lapidary artist, appraiser, and business owner throughout his decades in the industry.

With their unmatched services and low fees, reDollar.com is challenging some big names in the online consignment world.

A decision likely won’t come until January 2026 at the earliest, and the tariffs remain in effect until then.


Located in the revamped jewelry hall at the retailer’s New York City flagship, this opening is Tabayer’s first shop-in-shop.

As the gold price rises, the manufacturer is offering a 100 percent payout through Sept. 30 for gold clean scrap.

Jewelers of America is leading the charge to protect the industry amidst rising economic threats.

Guillermo del Toro’s 2025 “Frankenstein” will feature 27 jewels and objects from the storied brand, including pieces from its archives.

The Waldorf Astoria New York’s grand reopening this past summer means a homecoming for the industry group’s annual event.

Anglo plans to merge with Teck Resources Ltd. to form Anglo Teck. The deal changes nothing about its plans to offload De Beers.

The 9.51-carat fancy vivid blue diamond, which set two world auction records at Sotheby’s in 2014, is estimated to fetch up to $30 million.

The industry veteran joins the auction house as it looks to solidify its footprint in the jewelry market.

The nonprofit awarded four students pursuing a professional career in jewelry making and design with $2,250 each.

The Texas-based jeweler has also undergone a brand refresh, debuting a new website and logo.

The two organizations have finalized and signed the affiliation agreement announced in May.

The single-owner sale will headline Sotheby's inaugural jewelry auction at the Breuer building, its new global headquarters, this December.

From sunrise yoga to tariffs talks, these are some events to check out at the upcoming inaugural event.

Smith recalls a bit of wisdom the industry leader, who died last week, shared at a diamond conference years ago.

The “Victoria” necklace features a labradorite hugged by diamond accents in 18-karat yellow gold.

Two lower courts have moved to block the import taxes, which will remain in place as the legal battle continues.

The Kansas City Chiefs quarterback shares Hublot’s dedication to pursuing greatness, the Swiss watchmaker said.

The Type IIa stone, recovered from Botswana’s Karowe diamond mine last month, features unique coloration.

Breitling is now the NFL’s official timepiece partner, a move that puts the brand in front of the millions of Americans who watch football.

NYCJAOS is set for Nov. 21-23 in New York City’s Chelsea neighborhood.

U.S.-based investment company SMG Capital LLC is the new owner of the luxury brand.