mineral
Quartz Pebble
Silicon Dioxide (SiO2)
Hardness: 7 on Mohs scale; Color: White to milky translucent with green inclusions; Luster: Vitreous; Crystal Structure: Trigonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65
- Hardness
- 7 on Mohs scale
- Color
- White to milky translucent with green inclusions
- Luster
- Vitreous
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Physical properties
Hardness: 7 on Mohs scale; Color: White to milky translucent with green inclusions; Luster: Vitreous; Crystal Structure: Trigonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65
Formation & geological history
Formed through hydrothermal processes in veins or from the cooling of silica-rich magma; subsequently weathered and water-worn into a pebble shape over millions of years
Uses & applications
Commonly used in glassmaking, electronics (piezoelectric properties), abrasives, and as decorative gravel or river rock
Geological facts
Quartz is the most abundant and stable mineral on Earth's continental crust. The green inclusion seen here is likely chlorite or epidote trapped during the mineral's growth
Field identification & locations
Identify in the field by its ability to scratch glass and its lack of cleavage. Found globally in riverbeds, beaches, and mountain outcrops
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