Kalahari manganese fields, Northern Cape Province, South Africa

3.8 x 2.3 x 1.2 cm
1.5 x 0.9 x 0.5 in

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Ca₆Al₂(SO₄)₃(OH)₁₂·26H₂O

Yellow Ettringite has formed a bridge between two stacks of white Calcite crystals which are joined at the base. The Ettringite is has not formed discrete crystals but is rather a massive material. The Calcite is composed of many parallel stacked crystals and has a high luster. The specimen is in good condition with the exception of small innteral cleaves within the Calcite.