Thaumasite (Doubly-Terminated) - image 1

Thaumasite (Doubly-Terminated)

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A very nice pale yellow, transparent and zoned, elongated prismatic, doubly terminated, 1.5 cm long thaumasite crystal with an adjoining cluster of small thaumasite crystals. This is a fantastic thumbnail of this very rare silicate-carbonate-sulfate species from the Kalahari Manganese Fields.