The “watchmaker of shapes” debuted the reworked version of the vintage sports car-inspired timepiece at Watches & Wonders.
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

As demand for jewelry retail coaching grows, the company has established a dedicated business coaching leadership team.

The “Mountings 2026-2027” catalog showcases Stuller’s largest and most diverse assortment to date with more than 400 new mounting styles.

Gain access to the most exclusive and coveted antique pieces from trusted dealers during Las Vegas Jewelry Week.

The alert states that burglary crews are targeting jewelry businesses and details how jewelers and refineries can protect themselves.


Sally Morrison and Mark Klein discuss De Beers’ first beacon in 16 years and the mistake the industry made with lab-grown diamonds.

McKenzie spent 45 years with Spark Creations and is remembered for being kind, dedicated, and hardworking.

Gain access to the most exclusive and coveted antique pieces from trusted dealers during Las Vegas Jewelry Week.

Rolex focused exclusively on the Oyster Perpetual this year, as the model is celebrating its 100th anniversary.

The luxury giant discussed the Middle East conflict and its transformation plans, hinting at a stronger jewelry presence in North America.

“Diamond Divas,” a social media reality series by Shahla Karimi Jewelry, is nominated in the “Best Social: Fashion & Beauty” category.

Plus, how Saks Global’s bankruptcy affected the luxury giant’s first quarter.

Presented by Mason-Kay Jade, the summit, in its second year, will again be held during the Monterey Bay Jade Festival.

The group has announced its lineup of speakers and a new “Rising Stars” pavilion.

The “Carbon Form” collection explores the contrast between high and low materials, using rubber cord alongside 18-karat gold and gemstones.

The program provides essential funding to organizations for projects that enhance the jewelry industry.

The jewelry trade show is launching its first open-to-the-public event in Coconut Grove this November.

JSA is seeking information about the gunpoint robbery of a Kay Jewelers location in Oregon’s Washington Square Mall.

The top-performing watch models may be surprising, with Rolex and several popular pandemic-era picks notably absent from the top 20.

The “Scroll” toggle pendant, our Piece of the Week, opens to reveal a hidden message, mantra, or love letter written on washi paper.

Jewelers who misinterpret the state of the jewelry market risk employing the wrong retail strategy, cautions columnist Sherry Smith.

In her newly expanded role, she will continue to oversee the jewelry category, as well as watches, home, and accessories.

“The Godfather II” watch plays two melodies from the mob film’s score, “The Godfather’s Waltz” and “The Godfather Love Theme.”

Organizers have also introduced the new JCK Talks Signature Series, as well as an offering of watch-focused workshops and lectures.

The Alan Hodgkinson Medal recognizes gemologists who are consistently generous with their time and expertise.

The Swiss watchmaker is changing up its executive leadership team as part of a restructuring.

The “What’s Your Signature?” campaign invites women to think about how they see themselves.






















