Johya, our story

Two cousins, one shared standard

Johya was born from the meeting of two cousins, Vincent Renault, a precious stone dealer, and Dimitri Velasco, united by the same conviction: the Colombian emerald deserves to be sold transparently, at its fair value, with no middlemen. The company, JOHYA SAS, was founded in Paris on May 18, 2026: Vincent is its president, Dimitri its managing director.

Colombia, at source

Rather than buying on a wholesale market, we chose to go to the source. We source our emeralds directly in Colombia, in the Boyacá region, in Muzo, Chivor and Coscuez, where the stone comes out of the ground. For a stone sought on request, we also buy on the Bogotá market. Every purchase is negotiated on site and documented, from collection through to invoice.

Complete specialization

We work exclusively with emerald: one stone, one body of knowledge. Every piece is assessed against gemological criteria and comes with the report of an independent laboratory.

What we stand for

No phantom stock, no talk of "rarity", no hidden middleman margin. You pay for the stone, not for the chain. That is the Johya promise.

How we choose and check a stone is set out in our method, and the journey of an emerald follows one from the mine to France. The way we disclose treatments is in our authenticity policy, and every reference can be looked up on Verify my stone.