mineral
Rough Quartz (Milky / Clear Quartz)
Silicon Dioxide (SiO2)
Hardness: 7 on Mohs scale. Color: Colorless to translucent white (milky). Luster: Vitreous to greasy on fracture surfaces. Crystal structure: Trigonal/Hexagonal. Cleavage: None (conchoidal fracture). Specific gravity: 2.65.
- Hardness
- 7 on Mohs scale
- Color
- Colorless to translucent white (milky)
- Luster
- Vitreous to greasy on fracture surfaces
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Physical properties
Hardness: 7 on Mohs scale. Color: Colorless to translucent white (milky). Luster: Vitreous to greasy on fracture surfaces. Crystal structure: Trigonal/Hexagonal. Cleavage: None (conchoidal fracture). Specific gravity: 2.65.
Formation & geological history
Formed in igneous, metamorphic, and sedimentary environments across various geological eras, commonly crystallizing from hydrothermal fluids or magma cooling.
Uses & applications
Used widely in electronics (piezoelectric applications), glass manufacturing, abrasives, gemstones, decorative carvings, and mineral collections.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. Its name comes from the German word 'Quarz', which is of Slavic origin.
Field identification & locations
Identified by its Mohs hardness of 7 (scratches glass/steel easily), lack of cleavage, and characteristic conchoidal fracture. Found globally in granitic pegmatites, river gravels, and vein deposits.
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