mineral
Milky Quartz Pebble
Silicon Dioxide (SiO2)
Hardness: 7 (Mohs scale), Color: Opaque white to creamy white, Luster: Vitreous to waxy, Crystal Structure: Trigonal (often massive in pebbles), Cleavage: None/Conchoidal fracture.
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Physical properties
Hardness: 7 (Mohs scale), Color: Opaque white to creamy white, Luster: Vitreous to waxy, Crystal Structure: Trigonal (often massive in pebbles), Cleavage: None/Conchoidal fracture.
Formation & geological history
Formed from hydrothermal veins or as a late-stage mineral in igneous rocks; these rounded pebbles are created by fluvial or coastal erosion over thousands of years.
Uses & applications
Used in landscaping, construction aggregate, glass making, and as pocket stones or aquarium decor.
Geological facts
The milky white color is caused by millions of tiny fluid inclusions of gas and liquid trapped during the crystal's formation.
Field identification & locations
Found globally in riverbeds, beaches, and various sedimentary deposits. Identified by its hardness (can scratch glass) and waxy, white appearance.
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Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Schist
Schist
Metamorphic
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Gypsum (variety Selenite or Alabaster)
Calcium sulfate dihydrate (CaSO4·2H2O)
Mineral
Nephrite Jade
Nephrite
Mineral/Rock
Granite
Granite (Phaneritic intrusive igneous rock)
igneous