3 years ago
Brick-sized opal sells for nearly $144,000 at Alaska auctionJUNEAU, Alaska (AP) — A gemstone, billed as one of the largest gem-quality opals in existence, was sold for $143,750 at auction in Alaska on Sunday. The opal, dubbed the "Americus Australis," weighs more than 11,800 carats, according to the...