Roscherite
- Troussiani mica mine
- Black Mountain
- Oxford County
- Maine
- U.S.A.
- 4.9 by 4.1 by 1.9 cm – Miniature specimen (fits into a 5 cm cube)
Roscherite is a complex phosphate containing calcium, beryllium, and manganese. There many related species, distinguished by difficulty with careful X-ray diffraction study. This specimen features an open pocket, 25 by 15 mm, lined with roscherite aggregates to 2 mm. The matrix is a mica, possibly trilithionite, and a feldspar, likely microcline. This specimen came from the Joseph Urban collection, and bears his label.
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