mineral
Yellow Quartz Pebble
Silicon Dioxide (SiO2)
Hardness: 7 (Mohs), Color: Yellow-tan to amber, Luster: Vitreous to waxy (smooth from tumbling), Crystal System: Hexagonal (Trigonal), Cleavage: None (Conchoidal fracture)
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Physical properties
Hardness: 7 (Mohs), Color: Yellow-tan to amber, Luster: Vitreous to waxy (smooth from tumbling), Crystal System: Hexagonal (Trigonal), Cleavage: None (Conchoidal fracture)
Formation & geological history
Formed from hydrothermal veins or as a secondary mineral in various rock types. This specific specimen has been water-worn and smoothed by alluvial processes in a river or coastline.
Uses & applications
Common type of gravel used in landscaping, decorative river rock, and sometimes polished for low-end jewelry or aquarium decor.
Geological facts
Quartz is one of the most abundant minerals in the Earth's crust. Yellow varieties can be colored by tiny inclusions of iron oxides like goethite or limonite.
Field identification & locations
Identify by its ability to scratch glass and smooth, rounded shape. Commonly found in riverbeds, beaches, and glacial deposits worldwide.
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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