Opal. Boulder or nodular opal in a sandstone matrix from Queensland, Australia
Wall Art and Photo Gifts from Mary Evans Picture Library
Opal. Boulder or nodular opal in a sandstone matrix from Queensland, Australia
Boulder or nodular opal in a sandstone matrix from Queensland, Australia. Opals are not truely crystalline and are therefore mineraloids. They comprise of (hydrated silica glass)
Media ID 8582797
© Mary Evans / Natural History Museum
Australasia Australian Boulder Glassy Hydrated Matrix Mineraloid Nodule Opal Opalescence Silica Texture
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