mineral
Quartz Crystal Cluster
Silicon Dioxide (SiO2)
Hardness: 7 on Mohs scale; Color: White to transparent; Luster: Vitreous; Crystal structure: Trigonal; Cleavage: None, exhibits conchoidal fracture; Specific gravity: 2.65
- Hardness
- 7 on Mohs scale
- Color
- White to transparent
- Luster
- Vitreous
Identified More mineral →
Explore Quartz Crystal Cluster in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 7 on Mohs scale; Color: White to transparent; Luster: Vitreous; Crystal structure: Trigonal; Cleavage: None, exhibits conchoidal fracture; Specific gravity: 2.65
Formation & geological history
Formed from silica-rich hydrothermal solutions cooling and precipitating within fractures or cavities in rocks, occurring across various geological time scales.
Uses & applications
Used in electronics, oscillator circuits, glassmaking, abrasive materials, and as gemstone or mineral specimens in collections.
Geological facts
Quartz is one of the most abundant minerals in Earth's continental crust and exhibits piezoelectric properties, meaning it can generate an electrical charge under mechanical stress.
Field identification & locations
Easily identified by its distinct hexagonal crystal habit and high hardness which scratches glass. Found worldwide in igneous, metamorphic, and sedimentary rocks.
More like this
Other mineral specimens
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Soil with Mineral Detritus and Quartz Fragments
Regolith / Silicate Mineral Aggregate
sedimentary
Limonite / Goethite (Iron Ore Mineral nodule)
FeO(OH)·nH2O / FeO(OH)
mineral
Septarian Pebble
Septarian nodule / Concretion
sedimentary
Schist
Schist
Metamorphic
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral