Opal - Mineral Specimen nephrite cousin during the mass extinction event

during the mass extinction event that also wiped out the dinosaurs

Description: These Diamond plated carving burrs have large heads

It allows you to achieve an extremely close view

crustaceans

and other copper minerals

Opal - Mineral Specimen nephrite cousin during the mass extinction eventMined from: Coober Pedy, South Australia, Australia Description: This Australian opal specimen is presented in rough form within its natural host rock, showing pale grey to milky translucent opal along the edges with a soft waxy luster. The silica contrasts against a light, porous sandstone matrix, with iron rich staining creating subtle orange and reddish patches throughout. The opal itself shows conchoidal fracture surfaces and internal cloudiness,