DENVER (KDVR) — A gem that was found decades ago in a now-shuttered Colorado mine is going for thousands of dollars in an auction. According to the Colorado School of Mines, the Sweet Home Mine in ...

GOLD COAST, Australia--(BUSINESS WIRE)--The world’s largest online auction website for natural Opals and Gemstones has announced two new auction formats. The ‘Auctioneers Pick’ which runs every ...

GENEVA — A blue diamond weighing nearly 10 carats has sold at auction in Switzerland for 20.5 million Swiss francs ($25.6 million) including fees. The pear-shaped 9.51-carat “Mellon Blue” — named for ...

Gem Auctions DMCC, founded by mining entrepreneur Alan Davies, will hold its first-ever rough diamond auction in Dubai, UAE next month. Gem Auctions DMCC, founded by mining entrepreneur Alan Davies, ...