London-listed Gem Resources has sold 8 130 ct in its first sales tender for emeralds produced from the Gravelotte mine, in ...

Use precise geolocation data and actively scan device characteristics for identification. This is done to store and access ...

Gem merchant Guy Clutterbuck, who supplied some of the samples for this study, reported to one of the authors in 2013 and 2014 that limited emerald mining was still taking place near Musakashi. For ...