Home > Laskowski Ⅹ – April 6 > MS2021 Guimarãesite with Eosphorite

Guimarãesite with Eosphorite

Guimarãesite is a calcium zinc beryllium phosphate, and a member of the roscherite group. Chukanov et al. (2007) named the mineral after Djalma Guimarães (1894-1973), a Brazilian mineralogist known for his contributions to the topographic mineralogy of his homeland.

Green-gray spheres of mixed guimarãesite-zanazziite-greifenstenite to 4 mm formed alongside prismatic eosphorite crystals to 6 mm. Guimarãesite forms the exterior of the spheres with zanazziite-greifenstenite cores. The matrix is a microcline crystal, typical of a granitic pegmatite. Carries a Luiz Menezes label. Good piece! From the collection of E.R. Laskowski (1949-2020), a mining engineer who retired to Tucson, Arizona.

Price: $350

Item code: MS2021

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