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MD-130249
Ettringite
Hotazel mine, Hotazel, Kalahari manganese fields, Northern Cape Province, South Africa
Miniature, 4.3 x 3.8 x 0.9 cm
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Ettringite forms as a precipitate from hydrothermal solutions. It is famous from South Africa - represented here by a plate of mixed little euhedral, gemmy hexagonal crystals with small sugary microcrystals.