mineral
Quartz
Silicon Dioxide (SiO2)
Hardness: 7 on Mohs scale; Color: White to translucent with iron staining (brownish-yellow spots); Luster: Vitreous to greasy; Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.65
- Hardness
- 7 on Mohs scale
- Luster
- Vitreous to greasy
Identified More mineral →
Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 7 on Mohs scale; Color: White to translucent with iron staining (brownish-yellow spots); Luster: Vitreous to greasy; Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.65
Formation & geological history
Formed in a variety of geological environments reaching from igneous crystallizations (pegmatites) to hydrothermal veins and metamorphic processes. This specific specimen appears to be vein quartz.
Uses & applications
Used in glassmaking, electronics (piezoelectric properties), abrasives, construction aggregates, and as gemstones or collector specimens.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. It is highly resistant to both chemical and physical weathering.
Field identification & locations
Identify in the field by its hardness (will scratch glass and steel), lack of cleavage, and translucent appearance. It is found globally in various terrains.
More like this
Other mineral specimens
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Schist
Schist
Metamorphic
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Nephrite Jade
Nephrite
Mineral/Rock
Banded Gneiss (River Rock/Pebble)
Gneiss (specifically a banded variety often found as a river rock)
Metamorphic Rock
![Green Apatite on Albite (Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]) — mineral](https://media.rockidentification.com/2391a63f-fb20-47d5-af9a-2035851eb32e-thumbnail.jpg)
Green Apatite on Albite
Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]
mineral