
We go down the mine ourselves.
We choose the rough, we do everything else, and we deliver the certificate.
◆ Every gem we sell is sourced at the mine, cut, polished and certified by us.
From the shaft to your hand

Alluvial mine, Mogok, 2016 We go to the mine and down the shaft with the miners
Mogok’s gems come from alluvial pits, tunnels and the marble spoil that villagers sort by hand. We go there ourselves and work beside the miners: it is the only way to know where a gem really comes from.

David Nataf at the Mogok gem market, 2016 We choose the rough ourselves
At the market or straight from the miners, we look at every rough gem with a loupe and a torch for colour, clarity and how it will cut. Nothing is bought through a middleman.

Horn faceting tool, rough fixed in wax, Mogok, 2016 Traditional cutting and polishing, including on the horn tool
Mogok’s lapidaries still fix the rough with wax on a horn tool and place each facet by eye. We sit at the bench with them and follow the gem until it is finished.

David Nataf cutting a sapphire with Ku Pion, Mogok, 2016 Gemmological examination by Hana Nataf and David Nataf (GIA GG)
Each of us examines the finished gem independently: microscope, refractometer, polariscope, spectroscope. Inclusions are documented, never hidden.

Wax model, before casting We design the mount and make the jewel
Sketch, wax model, fitting, then casting, setting and polishing in our Porto workshop, directed by Pedro Manuel Sousa e Silva. You approve each stage on a video call.

Finished ring Delivered with an independent laboratory report
Your gem comes with a report from an independent laboratory (GIA, SSEF, Gübelin, GRS…) stating species, treatment and, where the laboratory can determine it, origin. It is also recorded on carat.technology.
« Atelier de dorure », David Nataf, YouTube · youtu.be/kILrdkmQO2c
Fine gold leaf gilding
In our Porto workshop, gold leaf is laid by hand with a brush, on lava beads and jewellery components. A service in its own right, on quotation.
Request a bespoke project
Tell us about the gem and the piece you imagine. We reply personally and suggest a video call. We do not publish prices for bespoke work: every gem is different.

