Our gemmologists
Hana Nataf and David Nataf choose, examine and certify every gem we sell. Gemmologists before they are jewellers.
Hana Nataf
- GIA Graduate Gemologist (GG), 2016, Gemological Institute of America
- GIA Accredited Jewelry Professional (AJP) and GIA Pearls Graduate
- GIA Alumni Association, active member since 2013
- Certifying gemmologist on carat.technology
Co-founder of NANA. With David, she examines and certifies every gem we sell.
David Nataf
- GIA Graduate Gemologist (GG), 2016, Gemological Institute of America, Carlsbad, California
- GIA Accredited Jewelry Professional (AJP) and GIA Pearls Graduate
- Gem-A Certificate in Gemmology (2017), The Gemmological Association of Great Britain
- GIA Alumni Association, active member since 2015
- Certifying gemmologist on carat.technology
Sources rough in Mogok himself, at the market and beside the miners, and follows the cutting at the lapidary’s bench.
Our diplomas, on display
Gems we have sourced and sold
Descriptions taken from our 2016 records; gems graded at the GIA laboratory in Bangkok. These gems have been sold and are not for sale. No report numbers are published here.
9.16 ct
- Gem
- Sapphire
- Colour
- royal blue
- Cut
- cabochon
- Mine
- Bobadan alluvial mine, Mogok
- Treatment
- Unheated, untreated
10.98 ct
- Gem
- Ruby
- Colour
- medium dark, strongly purplish red, « pigeon’s blood », translucent
- Cut
- cabochon
- Mine
- Mogok
- Treatment
- Unheated, untreated
9.20 ct
- Gem
- Spinel
- Colour
- green
- Cut
- oval
- Mine
- Mogok
- Treatment
- Untreated
Also sold: a 5.52 ct unheated royal blue sapphire, at auction in Hong Kong (Est-Ouest Auctions, 2017).
We certify what we sell, and we say so
Every gem we sell is examined in person by us and recorded on carat.technology. Because we are both the seller and the certifier, we say so openly. We sell only natural, untreated, unheated gems; geographic origin, such as Burma (Myanmar), is stated only from an independent laboratory report (GIA, SSEF, Gübelin, GRS, AGL…). carat.technology identifies gems from photographs and does not determine origin.