mineral
Quartz pebble
Silicon dioxide (SiO2)
AI-generated identification · may be incorrectHardness 7 on the Mohs scale, typically white or translucent to opaque, with a vitreous to greasy luster.
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Physical properties
Hardness 7 on the Mohs scale, typically white or translucent to opaque, with a vitreous to greasy luster.
Formation & geological history
Formed from igneous or metamorphic processes and subsequently weathered and rounded by water action in rivers or oceans.
Uses & applications
Commonly used in landscaping, construction aggregates, and occasionally tumbled for inexpensive jewelry or craft projects.
Geological facts
Quartz is one of the most abundant minerals in the Earth's continental crust and is highly resistant to weathering.
Field identification & locations
Identified by its hardness (scratches glass) and conchoidal fracture. Often found on beaches and riverbeds.
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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
Mineral Sand (Heavy Mineral Sand Concentrate)
Placer deposit concentrate containing minerals such as ilmenite, rutile, zircon, and magnetite
mineral
Septarian Pebble
Septarian nodule / Concretion
sedimentary
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic