bijoux-et-mineraux: Opal Pineapple – White Cliffs, NSW,…

bijoux-et-mineraux:

Opal Pineapple – White Cliffs, NSW, Australia

These pseudomorphs have been shaped when a mineral crystal of glauberite (or ikalite) was first changed by calcite after which opalized. They’re very uncommon and solely present in White Cliffs, Australia

Geology Nerd

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