mineral
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
AI-generated identification · may be incorrectHardness: 7 on Mohs scale; Color: Milky white to translucent with iron and manganese staining; Luster: Vitreous to waxy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture).
- Hardness
- 7 on Mohs scale
- Color
- Milky white to translucent with iron and manganese staining
- Luster
- Vitreous to waxy
Identified More mineral →
Explore Milky Quartz Pebble 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: Milky white to translucent with iron and manganese staining; Luster: Vitreous to waxy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture).
Formation & geological history
Forms in hydrothermal veins or as a primary constituent of igneous rocks. This specimen appears water-worn and polished, likely transported and shaped by river or glacial action.
Uses & applications
Used in jewelry (especially when tumbled), decorative landscaping, and as a source of silica in glassmaking and electronics.
Geological facts
Milkiness is caused by tiny fluid inclusions of gas or liquid trapped during crystal growth. It is the most common variety of crystalline quartz found on Earth's crust.
Field identification & locations
Identify by its hardness (it will scratch glass), waxy luster when wet, and lack of cleavage. Common in riverbeds and coastal areas 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
Tumbled granite
Granite, a coarse-grained felsic intrusive igneous rock
igneous
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