mineral
Yellow Quartz Pebble
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 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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Other mineral specimens
Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
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
Septarian Pebble
Septarian nodule / Concretion
sedimentary