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
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