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Englishite, Whitlockite, Robertsite


Englishite : K3Na2Ca10Al15[OH|(PO4)3]7 · 26H2O, Whitlockite : Ca9Mg[PO3OH][PO4]6, Robertsite : Ca3Mn3+4[(OH)3|(PO4)2]2 · 3H2O

Photo Copyright © Peter Haas  - This image is copyrighted. Unauthorized reproduction prohibited.
Locality: Tip Top Mine (Tip Top pegmatite), Fourmile, Custer District, Custer Co., South Dakota, USA
Rosettes of colourless englishite crystals to about 1 mm, with greyish white whitlockite on dark red robertsite. Field width: 9 mm. P Haas photograph and collection (no. 74-060).

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