Name QUARTZ
Variety RED QUARTZ
Origin Jacobina
Espiritu Santo
Brazil
Hardness 7
Composition SiO2
Crystaline sys. TRIGONAL
Size   16 x 9 x 5 cm
Weight 699 g




Description:
Quartz was chosen by the geologist Friedrich Mohs to represent grade 7 in his famous scale of hardness dating back to 1825, and which is still valid nowadays.


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QUARTZ



VARIETY RED QUARTZ