mineral
Quartz Pebble
Silicon Dioxide (SiO2)
Hardness: 7 on Mohs scale; Color: Creamy white to translucent yellowish; Luster: Vitreous to waxy; Crystal Structure: Trigonal; Cleavage: None; Specific Gravity: 2.65.
- Hardness
- 7 on Mohs scale
- Color
- Creamy white to translucent yellowish
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 7 on Mohs scale; Color: Creamy white to translucent yellowish; Luster: Vitreous to waxy; Crystal Structure: Trigonal; Cleavage: None; Specific Gravity: 2.65.
Formation & geological history
Formed from molten silica cooling in igneous rocks or as veins in metamorphic environments. This specific specimen has been rounded and smoothed by water erosion through transport in a river or coastal environment.
Uses & applications
Used in glass manufacturing, electronics (piezoelectric properties), abrasives, and as a low-cost decorative garden stone.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. These small pebbles are often referred to as 'river stones' or 'sea glass' neighbors when found in nature.
Field identification & locations
Identify by its hardness (will scratch glass) and lack of cleavage. Found worldwide in riverbeds, beaches, and gravel pits.
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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
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