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Tin Mountain Mine, Fourmile, Custer District, Custer Co., South Dakota, USA

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Montebrasite : LiAl[(OH,F)|PO4]

Tin Mountain Mine, Fourmile, Custer District, Custer Co., South Dakota, USA

10 cm terminated crystal.
 © Stephen E. FritzPhoto ID: 235631    View Count: 24

Montebrasite : LiAl[(OH,F)|PO4]

Tin Mountain Mine, Fourmile, Custer District, Custer Co., South Dakota, USA

Crystal approximately 25 cm tall. South Dakota School of Mines & Technology Museum of Geology.
 © Stephen E. FritzPhoto ID: 235661    View Count: 23

Tantalite-(Mn) : MnTa2O6

Tin Mountain Mine, Fourmile, Custer District, Custer Co., South Dakota, USA

Black short prismatic crystal od manganotantalite in feldspar. Size of crystal 3×1 cm. Collection of the Moravian Museum Brno (http://www.mzm.cz).
 © Jakub JirásekPhoto ID: 82528    View Count: 163
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