mineral
Quartz (Agate/Jasper pebble)
Silicon Dioxide (SiO2)
Hardness of 7 on the Mohs scale, brownish to yellowish-tan color, vitreous to waxy luster, trigonal crystal system, conchoidal fracture, specific gravity of 2.65
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Physical properties
Hardness of 7 on the Mohs scale, brownish to yellowish-tan color, vitreous to waxy luster, trigonal crystal system, conchoidal fracture, specific gravity of 2.65
Formation & geological history
Formed through precipitation from silica-rich solutions in sedimentary, igneous, or metamorphic environments over millions of years
Uses & applications
Used in jewelry, decorative items, lapidary arts, and as a durable mineral specimen for collectors
Geological facts
Quartz is one of the most abundant minerals in Earth's continental crust and exhibits piezoelectric properties
Field identification & locations
Can be identified by its high hardness (scratches glass), lack of cleavage, and conchoidal fracture. Commonly found in riverbeds, gravel deposits, and weathering outcrops worldwide
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Limonite / Goethite (Iron Ore Mineral nodule)
FeO(OH)·nH2O / FeO(OH)
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Septarian Pebble
Septarian nodule / Concretion
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Schist
Schist
Metamorphic
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral