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Though modest in size
they built new chambers onto them
When held up to the light
Approximate Size for 1 piece: H 9cm x W 9cm x D 9cm Approximate Weight for 1 piece: 1600g
Its color comes from trace amounts of iron trapped in the crystal
Opal - Mineral Specimen prehistoric coral Though modest in sizeMined 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,