mineral
Milky Quartz Pebble
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 7 on Mohs scale; Color: White to off-white; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal (though microcrystalline in this weathered form); Cleavage: None/Conchoidal fracture; Specific gravity: 2.65
- Hardness
- 7 on Mohs scale
- Color
- White to off-white
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 7 on Mohs scale; Color: White to off-white; Luster: Vitreous to waxy; Crystal structure: Trigonal/Hexagonal (though microcrystalline in this weathered form); Cleavage: None/Conchoidal fracture; Specific gravity: 2.65
Formation & geological history
Forms in hydrothermal veins or pegmatites; this specific specimen has been eroded and smoothed by water over a long period, likely in a riverbed or coastal environment.
Uses & applications
Used in landscaping, glass manufacturing, electronics (due to piezoelectricity), and as a base material for various industrial abrasives.
Geological facts
Milky quartz gets its white color from tiny fluid inclusions of gas or liquid trapped during crystal growth. It is one of the most common minerals on Earth's crust.
Field identification & locations
Identified by its hardness (it can scratch glass), lacks of cleavage, and translucent white appearance. Commonly found in riverbeds, beaches, and gravel pits worldwide.
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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