mineral
Milky quartz
Quartz (silicon dioxide, SiO₂)
AI-generated identification · may be incorrectWhite to translucent, glassy-to-greasy luster, with irregular fracture and no cleavage; Mohs hardness 7, specific gravity about 2.65. The specimen appears massive and weathered, so crystal structure is not visible.
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Physical properties
White to translucent, glassy-to-greasy luster, with irregular fracture and no cleavage; Mohs hardness 7, specific gravity about 2.65. The specimen appears massive and weathered, so crystal structure is not visible.
Formation & geological history
Quartz commonly crystallizes from silica-rich fluids in veins and pegmatites, or forms as grains in rocks; it occurs across many geological ages. This loose piece’s exact age and source cannot be determined from the image.
Uses & applications
Used as a silica source in glass and industrial materials; attractive pieces may be kept as inexpensive mineral specimens.
Geological facts
Quartz is one of Earth’s most abundant minerals and commonly occurs in granites and hydrothermal veins.
Field identification & locations
Look for hardness near 7 (it can scratch glass), a glassy sheen, and absence of cleavage; milky quartz occurs worldwide. The image is consistent with quartz but cannot rule out other pale minerals such as calcite.
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Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
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igneous
Unidentified pink-and-gray mineral or rock specimen
Undetermined; the image is too blurry for reliable identification
mineral