Name QUARTZ
Variety QUARTZ-HEDENBERGITE
Origin Huanggang Mine (Inner Mongolia) China
Hardness 7
Composition SiO2
Crystaline sys. HEXAGONAL
Size   6,5x1,9x1 cm
Weight 9 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. The color of this varietal is due to multiple inclusions of hedenbergite, a green/black-coloured varietal of diopside.


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QUARTZ



VARIETY QUARTZ-HEDENBERGITE