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Pararobertsite
Type Locality
Tip Top Mine (Tip Top pegmatite), Fourmile, Custer District, Custer Co., South Dakota, USA
Mineral Data
Ca
2
Mn
3+
3
(PO
4
)
3
O
2
·3H
2
O
Strunz:
8.DH.30
Physical Properties
Crystal System:
Monoclinic
Streak:
Brown Red
Hardness:
2.0
Tenacity:
brittle
