19 août 2022
Bonhams Presents Two Online Sales Featuring Gemstones and Mineral Decor

08 juin 2020
Crystal Opal with Multi-Color Fire, Lightning Ridge, New South Wales, Australia

08 juin 2020
Stunning Large Blue Green Opal, Lighting Ridge, New South Wales, Australia

08 juin 2020
Black Opal with "Grass" Pattern, Lightning Ridge, New South Wales, Australia

08 juin 2020
Midnight Black Opal with Red and Green Pattern Cathedral Window, Lightning Ridge, New South Wales, Australia

08 juin 2020
Black "Nobby" Opal with Multi-color Fire, Kelly's Field, Lightning Ridge, New South Wales, Australia

08 juin 2020
41 carats Black Opal with Floral Pattern Red Play of Color

07 août 2019
Legendary mineral collector Rock H. Currier's collection celebrated in August Nature & Science Auction

07 août 2018
Enormous 'lightning bolt' gold nugget - rarer than any diamond - to bring $100,000 at auction

10 mai 2018
Conch Pearl, Strombus gigas or "Queen Conch", Caribbean Sea
