mineral
Clear Quartz
Silicon dioxide (SiO2)
Hardness: 7 on the Mohs scale. Color: Colorless/Transparent. Luster: Vitreous. Crystal Structure: Hexagonal (trigonal). Cleavage: None (conchoidal fracture). Specific Gravity: 2.65.
- Hardness
- 7 on the Mohs scale
- Color
- Colorless/Transparent
- Luster
- Vitreous
Identified More mineral →
Explore Clear Quartz in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 7 on the Mohs scale. Color: Colorless/Transparent. Luster: Vitreous. Crystal Structure: Hexagonal (trigonal). Cleavage: None (conchoidal fracture). Specific Gravity: 2.65.
Formation & geological history
Formed in various geological environments, most commonly in igneous rocks like granite pegmatites and metamorphic rocks. This specimen likely originated from the Brazil crystalline shield which is billions of years old.
Uses & applications
Used in electronics for its piezoelectric properties, glass manufacturing, as a gemstone in jewelry, and widely collected as metaphysical or decorative specimens.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. The location provided (Minas Gerais, Brazil) is world-famous for producing some of the highest quality quartz crystals on Earth.
Field identification & locations
Identify by its hardness (scratches glass), lack of cleavage, and transparent appearance. Minas Gerais is a primary global source for this mineral.
More like this
Other mineral specimens
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Schist
Schist
Metamorphic
Sandstone with Mineral Veining or Crust
Sedimentary Sandstone (mostly SiO2 with Fe2O3 tinting)
sedimentary
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral
Gypsum (variety Selenite or Alabaster)
Calcium sulfate dihydrate (CaSO4·2H2O)
Mineral
Nephrite Jade
Nephrite
Mineral/Rock