mineral
Clear Quartz (Tumbled)
Silicon Dioxide (SiO2)
Hardness: 7 on Mohs scale; Color: Colorless to white/milky; Luster: Vitreous (glassy); Crystal Structure: Hexagonal; Cleavage: None
- Hardness
- 7 on Mohs scale
- Color
- Colorless to white/milky
- Luster
- Vitreous (glassy)
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Physical properties
Hardness: 7 on Mohs scale; Color: Colorless to white/milky; Luster: Vitreous (glassy); Crystal Structure: Hexagonal; Cleavage: None
Formation & geological history
Forms in a wide range of geological environments, most commonly from the cooling of magma or in hydrothermal veins and pegmatites. Found across all geological ages.
Uses & applications
Used in electronics (oscillators), clocks, glassmaking, and extensively in jewelry, lapidary arts, and spiritual practice.
Geological facts
Quartz is one of the most abundant minerals in Earth's continental crust. Pure clear quartz is also known as 'Rock Crystal', a name derived from the Greek word 'krystallos' meaning ice.
Field identification & locations
Identify by its hardness (scratches glass), glassy luster, and lack of cleavage. Tumbled stones like this are commonly found in gift shops and mineral kits globally.
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Other mineral specimens
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Sandstone with Mineral Veining or Crust
Sedimentary Sandstone (mostly SiO2 with Fe2O3 tinting)
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