Gypsum crystals

Gypsum crystals

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Credit: DIRK WIERSMA/SCIENCE PHOTO LIBRARY

Caption: Gypsum crystals. These rosette-shaped crystal groups of gypsum (calcium sulphate, CaSO4) have formed in a crack or void inside a rhyolitic (composed of rhyolite) matrix rock (red). The individual rosettes are around 10 millimetres in diameter.

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Keywords: calcium sulphate, close-up, crystal, crystalline, crystallised, crystals, detail, earth science, geological, geology, gypsum, matrix rock, mineral, mineralogy, minerals, rhyolitic, rock, rocks, rosette, rosettes, sample, specimen

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