Prism polished order in rock crystal 750gr 115mm from Madagascar

Size: 115x75x55mm
Weight: 750 grams
Origin: Madagascar
Mineral: Quartz
Reference: 220908510

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Prism made of re-surfaced natural rock crystal

Mineralogy:
Quartz is a mineral species of the silicate group, subgroup of tectosilicates, composed of silicon dioxide, or silica, with the chemical formula SiO2, with traces of different elements such as Al, Li, B, Fe, Mg, Ca, Ti, Rb, Na, OH. It comes in the form of either large colorless, colored or smoked crystals, or microscopic crystals of translucent appearance. Constituting 12% (by mass) of the lithosphere, quartz is the most common mineral (oxygen and silicon are respectively the first and second constituents, in order of importance, of the lithosphere), it is an important component of granite, whose residual spaces it fills, and of granitic (gneiss, quartzite) and sedimentary (sand, sandstone) metamorphic rocks order.