Mineral Specimen #2404 Ettringite on Calacite
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.
This mineral is also found in the following galleries: Minerals From Africa | Sulfates | Calcite | Rare Minerals | Minerals Priced Between 50 and 99 Dollars
