mineral
Likely milky quartz
Quartz (SiO₂)
AI-generated identification · may be incorrectWhite to cream, opaque and rough with a vitreous-to-dull luster; Mohs hardness 7, trigonal crystal structure, and no cleavage, breaking with uneven or conchoidal surfaces. The image’s scale and lighting limit certainty; it may be another pale quartz-rich rock.
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Physical properties
White to cream, opaque and rough with a vitreous-to-dull luster; Mohs hardness 7, trigonal crystal structure, and no cleavage, breaking with uneven or conchoidal surfaces. The image’s scale and lighting limit certainty; it may be another pale quartz-rich rock.
Formation & geological history
Quartz commonly crystallizes from silica-rich fluids in veins and cavities, or forms during igneous and metamorphic processes. Its age cannot be determined from the photograph.
Uses & applications
Quartz is used in glassmaking, electronics, abrasives, and decorative stone; attractive pieces may be collected or used in jewelry.
Geological facts
Quartz is one of Earth’s most abundant minerals and is resistant to weathering, so it often persists in soils and sediments.
Field identification & locations
Look for hardness sufficient to scratch glass, lack of cleavage, and a glassy fracture; common in veins and many rock types worldwide. A simple photo cannot confirm the identification.
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Metamorphic
Sandstone (with potential mineral staining/concretions)
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Granite, a coarse-grained felsic intrusive igneous rock
igneous
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Granite
Granite (Phaneritic intrusive igneous rock)
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