Fransoletite : Ca3Be2(PO4)2(PO3OH)2·4H2O
Tiptopite : K2(Na,Ca)2Li3Be6(PO4)6(OH)2·H2O
Roscherite : Ca2Mn2+5Be4(PO4)6(OH)4·6H2O
Beryl : Be3Al2(Si6O18)
30mm x 10mm x 10mm
Mineral(s)
Acquisition date:
1985
Photo added to mindat.org
“Aggregates of bladed Fransoletite (right center) with prismatic Tiptopite (left) on Roscherite from the type locality, the Tip Top mine, Custer co., S. Dakota, USA. Field of view: 4 mm. Specimen and photo: Knut Eldjarn.”
Knut Eldjarn - 8th April 2006
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