mineral
Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Hardness: 7 (Mohs scale); Color: Clear to translucent; Luster: Vitreous/Glassy; Crystal structure: Trigonal; Cleavage: None; Specific gravity: 2.65
- Hardness
- 7 (Mohs scale)
- Color
- Clear to translucent
- Luster
- Vitreous/Glassy
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Physical properties
Hardness: 7 (Mohs scale); Color: Clear to translucent; Luster: Vitreous/Glassy; Crystal structure: Trigonal; Cleavage: None; Specific gravity: 2.65
Formation & geological history
Forms in all temperatures and environments, typically through hydrothermal activity or crystallization from magma. Found in igneous, metamorphic, and sedimentary settings.
Uses & applications
Used in electronics for its piezoelectric properties, glassmaking, construction sand, and widely in jewelry and energy-work collections.
Geological facts
Quartz is one of the most abundant minerals on Earth. Its name comes from the German word 'Quarz', which originally meant 'hard'. Clear quartz is often called the 'Master Healer' in metaphysical traditions.
Field identification & locations
Identify in the field by its hardness (scratches glass), lack of cleavage, and hexagonal crystal habit. Common in pegmatites, veins, and as river pebbles.
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