“Natural gem auctions“ – founded in September 2017 – is Europe’s first auction house that is exclusively dealing with certified gemstones of high quality.

The idea to establish an auction house is rooted in a deep affection towards gemstones and the profound knowledge of alternative types of investment. Over the past years Emanuele Bertolaso and Thomas Schröck have established themselves as specialists in this very field.

Each of the gemstones and diamonds offered in the auction have a certificate issued by one of the worlds most renowned gemological institutes. These certificates verify the originality, certain attributes as well as the provenance of each individual stone.

Thanks to its international relations with the best gemological institutes, its global clientele and the recognition of international market for gemstones, NGA guarantees excellent advice and guidance.