Fluorite & Calcite on Quartz (fluor.) - unusual locality

Item Description

A Brazilian fluorite location is always something to note, as there seem so few. Fascinating, large specimen consisting of pale green, frosted, octahedral Fluorite crystals to 1.4 cm and lustrous, yellow, rhombic Calcite crystals to 1.9 cm from Rio Grande do Norte in Brazil. These rest within Quartz-lined cavities of a "box work lattice" matrix. The well-formed Fluorites have a rich, blue-purple fluorescence, and the Calcites, which actually have curved surfaces not unlike the famous Smithsonite rhombs from Tsumeb, have a light, golden-white fluorescence. I have not seen a specimen like this from Rio Grande do Norte before, and when you add together all the interesting and unusual aspects of it, they make quite the cabinet specimen.