mineral
Milky quartz
Quartz (silicon dioxide, SiO₂)
AI-generated identification · may be incorrectLikely massive, milky quartz: Mohs hardness 7; white to gray, vitreous to slightly dull luster, no cleavage, and uneven fracture. The image does not reveal crystal form or specific gravity reliably.
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Physical properties
Likely massive, milky quartz: Mohs hardness 7; white to gray, vitreous to slightly dull luster, no cleavage, and uneven fracture. The image does not reveal crystal form or specific gravity reliably.
Formation & geological history
Forms when silica-rich fluids crystallize in veins and fractures, or during cooling of silica-rich magma; quartz occurs in rocks of many geological ages and settings.
Uses & applications
Used in glassmaking, electronics, abrasives, and construction; attractive pieces are collected or used decoratively.
Geological facts
Quartz is one of Earth’s most abundant minerals and can occur in igneous, sedimentary, and metamorphic rocks.
Field identification & locations
Look for hardness sufficient to scratch glass, lack of cleavage, and a glassy fracture; common worldwide, especially in quartz veins and granitic rocks. The photo alone cannot confirm the identification.
