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Mineralpedia Details for Roscherite

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Roscherite

Roscherite

Named after German mineral collector Walter Roscher. Roscherite can be found in granite and pegmatite cavities in localities including Germany, England, Brazil, and the USA including at the Tip Top mine here in Black Hills of South Dakota.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/roscherite.pdf

Formula
Ca2Mn2+5Be4(PO4)6(OH)4ยท6H2
Crystal System
Triclinic 
Crystal Habit
Pistolitic 
Cleavage
Good, Distinct, None 
Color
light brown, dark brown, olive green, orange red, red 
Streak
light brown 
Class
Triclinic - Pinacoidal 
Hardness
4.5 
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Roscherite from Tip Top mine, Custer Co., South Dakota, United States

Roscherite
            from Tip Top mine, Custer Co., South Dakota, United States

Red rosettes of Roscherite with acicular white Tiptopite and white balls of Englishite less than 1mm.

Dark, olive green crystal, 1mm. Unusually rare and large crystal for Roscherite (XRD).

The last two photos are lilac Ruscherite with pink Montgomeryite. A

The Roscherites at Tip Top are crystallized in a range of colors and the lilac colored crystals may be Zanazziite, the Mg member. The pink rosettes are Montgomeryite clusters to 1.5mm. These clusters, when viewed under the scope are very lustrous and distinct.

Click thumbnail images for larger view.

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