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Fairfieldite & Roscherite

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CAM108656

Fairfieldite & Roscherite

ex Grenier collection

Description Tabs

Description
Locality: 
Tip Top Mine, Fourmile, Custer County, South Dakota, United States of America
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4 × 3.7 × 2.2 cm
Description

A very rich coverage of white to colourless aggregates of fairfieldite, dark brown roscherite crystals and some blocky colourless whitlockite crystals.
Beautiful under magnification.
Ex Grenier collection, ex Loomis collection.

Mineral Data
What's on the rock

Fairfieldite

Formula: 
Ca2(Mn2+,Fe2+)(PO4)2·2H2O
Strunz: 
8.CG.05
Hardness: 
3.5
Streak: 
White
Type Locality: 
Fillow Quarry (Branchville Quarry; Branchville Mica Mine; Smith Mine), Branchville, Redding (Reading), Fairfield Co., Connecticut, USA

Roscherite

Formula: 
Ca2Mn2+5Be4(PO4)6(OH)4·6H2O
Strunz: 
8.DA.10
Crystal System: 
Monoclinic Tabular crystals or platy aggregates
Hardness: 
4.5 - 0.0
Streak: 
White
Type Locality: 
Greifenstein Rocks, Ehrenfriedersdorf, Erzgebirge, Saxony, Germany
Cartils Minerals

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