mineral
Quartz Pebble
Silicon Dioxide (SiO2)
Hardness of 7 on the Mohs scale, milky white to translucent color, vitreous to greasy luster, trigonal crystal system, lacks cleavage with conchoidal fracture, specific gravity around 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, milky white to translucent color, vitreous to greasy luster, trigonal crystal system, lacks cleavage with conchoidal fracture, specific gravity around 2.65.
Formation & geological history
Formed through crystallization from silica-rich solutions or cooling magmas, later weathered, eroded, and smoothed by water action in rivers or beaches over millions of years.
Uses & applications
Used in landscaping, decorative stone, glass manufacturing, abrasives, and amateur rock collecting.
Geological facts
Quartz is one of the most abundant and durable minerals in Earth's continental crust, highly resistant to both chemical and physical weathering.
Field identification & locations
Found globally in almost all geological environments; easily identified by its high hardness (scratches glass) and lack of cleavage.
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Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Soil with Mineral Detritus and Quartz Fragments
Regolith / Silicate Mineral Aggregate
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Limonite / Goethite (Iron Ore Mineral nodule)
FeO(OH)·nH2O / FeO(OH)
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Septarian Pebble
Septarian nodule / Concretion
sedimentary
Schist
Schist
Metamorphic
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral