Opal - Mineral Specimen prehistoric coral Approximate Size for 1 piece:

Approximate Size for 1 piece: H 9cm x W 9cm x D 9cm Approximate Weight for 1 piece: 1600g

Though modest in size

When held up to the light

Diameter: 23cm

Unlike more uniform jaspers

Opal - Mineral Specimen prehistoric coral Approximate Size for 1 piece:Mined 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,