mineral
Quartz (Milky/Smoky mix)
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 7 on Mohs scale; Color: transluscent white to yellowish-tan; Luster: Vitreous to greasy; Crystal Structure: Hexagonal (trigonal); Cleavage: None/Conchoidal fracture.
- Hardness
- 7 on Mohs scale
- Color
- transluscent white to yellowish-tan
- Luster
- Vitreous to greasy
Identified More mineral →
Explore Quartz (Milky/Smoky mix) 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: transluscent white to yellowish-tan; Luster: Vitreous to greasy; Crystal Structure: Hexagonal (trigonal); Cleavage: None/Conchoidal fracture.
Formation & geological history
Formed from cooling silica-rich magma or through hydrothermal precipitation in veins. These specimens appear to be weathered nodules or vein fragments.
Uses & applications
Used widely in glass making, electronics (due to piezoelectric properties), abrasives, and as decorative garden stones or collectible mineral specimens.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. Pure quartz is clear, but impurities and structural defects provide the wide range of colors seen in types like amethyst, citrine, and smoky quartz.
Field identification & locations
Identify by its hardness (it will scratch glass) and lack of cleavage. Often found in riverbeds, mountains, and near igneous outcrops globally.
More like this
Other mineral specimens
Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Granite
Granite (Phaneritic intrusive igneous rock)
igneous
Septarian Pebble
Septarian nodule / Concretion
sedimentary