mineral
Quartz pebble
Silicon dioxide (SiO2)
AI-generated identification · may be incorrectHardness 7, whitish/yellowish color, waxy to vitreous luster, conchoidal fracture. Often smoothed by water action.
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Physical properties
Hardness 7, whitish/yellowish color, waxy to vitreous luster, conchoidal fracture. Often smoothed by water action.
Formation & geological history
Formed in igneous, metamorphic, or sedimentary rocks, then weathered and transported by water, becoming rounded.
Uses & applications
Used in landscaping, construction, and sometimes tumbled for jewelry or collecting.
Geological facts
Quartz is one of the most abundant minerals in the Earth's continental crust.
Field identification & locations
Identify by its hardness (scratches glass) and lack of cleavage. Commonly found in riverbeds and beaches.
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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
Calcite–fluorite mineral specimen with iron-oxide staining
Calcite (CaCO₃), likely fluorite (CaF₂), with possible quartz and iron/manganese oxides
mineral
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Septarian Pebble
Septarian nodule / Concretion
sedimentary