mineral
Milky quartz
Quartz (SiO₂)
AI-generated identification · may be incorrectWhite to pale gray, opaque and massive, with a vitreous-to-dull luster and no visible crystal faces. Mohs hardness 7; hexagonal crystal structure, no cleavage, and uneven to conchoidal fracture; the image alone cannot confirm composition.
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Physical properties
White to pale gray, opaque and massive, with a vitreous-to-dull luster and no visible crystal faces. Mohs hardness 7; hexagonal crystal structure, no cleavage, and uneven to conchoidal fracture; the image alone cannot confirm composition.
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 for decorative stone, carvings, countertops, and mineral collections; quartz is also an important industrial source of silica, though this specimen’s suitability is unknown.
Geological facts
Milky color comes from microscopic fluid or gas inclusions that scatter light.
Field identification & locations
A likely identification from the white, massive appearance; check for glassy fracture and ability to scratch glass, while noting that other pale rocks can look similar. Common worldwide, especially in quartz veins.
