mineral
Quartz Pebble
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, typically white or colorless, vitreous luster, conchoidal fracture, no true cleavage, specific gravity of 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, typically white or colorless, vitreous luster, conchoidal fracture, no true cleavage, specific gravity of 2.65.
Formation & geological history
Formed through crystallization from silicate melts in igneous rocks or as a precipitate in hydrothermal veins. Over long periods of time, weathering and water transport erode and smooth the quartz into rounded pebbles.
Uses & applications
Used in landscaping, decorative stone, glass manufacturing, electronics, and lapidary work.
Geological facts
Quartz is one of the most abundant and durable minerals in Earth's continental crust, making up a large percentage of beach sand and river pebbles.
Field identification & locations
Easily identifiable by its high hardness (scratches glass), lack of cleavage, and resistance to chemical weathering. Found worldwide in rivers, streams, 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
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