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Bultfonteinite is a pink, light-brown or colorless mineral with chemical formula Ca₂SiO₂(OH,F)₄. It was first discovered in 1903 or 1904 in the Bultfontein mine in Kimberley, South Africa, with other finds in the same country in the following years. It has since been found across the world including in Australia, Botswana, Japan, Russia and the United States. The mineral occurs as radiating prismatic acicular crystals and radial spherules up to 2 cm (0.79 in). This bultfonteinite specimen was extracted from the Shijiangshan mine in Chifeng, Inner Mongolia, China.Photograph credit: Ivar Leidus

See also

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