mineral
Massive Quartz
Silicon dioxide (SiO2)
AI-generated identification · may be incorrectHardness: 7 on Mohs scale, Color: white to light gray with some impurities, Luster: vitreous (glassy) to greasy, Crystal structure: trigonal (though lacks crystal faces in massive form), Cleavage: none (exhibits conchoidal fracture), Specific gravity: 2.65
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Physical properties
Hardness: 7 on Mohs scale, Color: white to light gray with some impurities, Luster: vitreous (glassy) to greasy, Crystal structure: trigonal (though lacks crystal faces in massive form), Cleavage: none (exhibits conchoidal fracture), Specific gravity: 2.65
Formation & geological history
Forms from silica-rich hydrothermal fluids cooling in veins or as a major constituent of igneous rocks like granite and pegmatite. Its geological age varies widely depending on the host rock formation.
Uses & applications
Used in the manufacture of glass, as an abrasive, in construction materials, and in the production of silicon for electronics.
Geological facts
Quartz is one of the most abundant minerals in the Earth's continental crust. Massive quartz often hosts other valuable minerals, including gold, in hydrothermal veins.
Field identification & locations
Can be identified in the field by its hardness (scratches glass), lack of cleavage, distinctive conchoidal fracture, and vitreous to greasy luster. Generally found worldwide in many geological settings.
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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
Tumbled granite
Granite, a coarse-grained felsic intrusive igneous rock
igneous
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