#18a • 15.65 Carat Opal Specimen

Part of December 2025 Curiosities Auction (timed auction by Alaska Premier Auctions & Appraisals)

High bid $150.00

Status: Sold

A natural 15.65 carat precious opal specimen from Ethiopia. The specimen displays a bright play of color but is not suitable for gem cutting. Ethiopian opals form through the interaction of water with silica-rich volcanic rocks, unlike many other opals that form in sedimentary environments. Ethiopian opals primarily originate in volcanic deposits, particularly in nodules and seams within basaltic rocks.