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

bijoux-et-mineraux:

Opal Pineapple – White Cliffs, NSW, Australia

These pseudomorphs were formed when a mineral crystal of glauberite (or ikalite) was first replaced by calcite and then opalized. They are very rare and only found in White Cliffs, Australia

Geology Nerd

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