Mineral Monday is a weekly video series exploring the many amazing minerals, fossils, and historic objects on display at the W.M. Keck Earth Science and Mineral Engineering Museum as told by museum ...

Opals, as hydrated forms of silica, encompass a wide range of materials formed by both biogenic and diagenetic processes. The genesis of opal involves precipitation from silica‐rich fluids and ...

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"That's just wild." Common opal can be found all over the world, but the precious, coloured opal of Lightning Ridge is exceedingly rare. The traditional owners of this land have a longstanding ...