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Pararobertsite

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CHP851026

Pararobertsite

Classic Locality

Description Tabs

Description
Locality: 
Tip Top Mine, Fourmile, Custer County, South Dakota, United States of America
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.1 × 1.5 × 1 cm
Description

specimen with a very nice group of dark brown crystals of pararobertsite on matrix.

c. 2235

Mineral Data
What's on the rock

Pararobertsite

Formula: 
Ca2Mn3+3(PO4)3O2·3H2O
Strunz: 
8.DH.30
Crystal System: 
Monoclinic
Hardness: 
2.0
Streak: 
Brown Red
Type Locality: 
Tip Top Mine (Tip Top pegmatite), Fourmile, Custer District, Custer Co., South Dakota, USA

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