mineral
Clear Quartz
Silicon Dioxide (SiO2)
Mohs hardness: 7; Color: Colorless/Transparent; Luster: Vitreous; Crystal system: Trigonal/Hexagonal; Cleavage: None/Conchoidal fracture; Specific gravity: 2.65
- Hardness
- 7
- Color
- Colorless/Transparent
- Luster
- Vitreous
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Physical properties
Mohs hardness: 7; Color: Colorless/Transparent; Luster: Vitreous; Crystal system: Trigonal/Hexagonal; Cleavage: None/Conchoidal fracture; Specific gravity: 2.65
Formation & geological history
Formed during the final stages of cooling in igneous rocks (pegmatites), in hydrothermal veins, and in metamorphic environments. It is found in all geological ages.
Uses & applications
Used in electronics (oscillators), manufacturing glass, abrasives, jewelry (gemstones), and as decorative display specimens.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. Its piezoelectric properties make it essential for timing in watches and computers.
Field identification & locations
Identify by its hardness (scratches glass), conchoidal fracture, and lack of cleavage. Often found in riverbeds or near mountain ranges with volcanic history.
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Arenite (SiO2 based)
sedimentary
Schist
Schist
Metamorphic
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Gypsum (variety Selenite or Alabaster)
Calcium sulfate dihydrate (CaSO4·2H2O)
Mineral
Nephrite Jade
Nephrite
Mineral/Rock
Granite
Granite (Phaneritic intrusive igneous rock)
igneous