mineral
Milky quartz
Quartz (silicon dioxide, SiO₂)
AI-generated identification · may be incorrectWhite to pale gray, translucent to opaque, with a vitreous-to-greasy luster and no cleavage; Mohs hardness 7, specific gravity about 2.65. The specimen appears massive and rough, so crystal form is not visible.
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Physical properties
White to pale gray, translucent to opaque, with a vitreous-to-greasy luster and no cleavage; Mohs hardness 7, specific gravity about 2.65. The specimen appears massive and rough, so crystal form is not visible.
Formation & geological history
Quartz commonly crystallizes from silica-rich fluids in veins and cavities, or grows in igneous and metamorphic rocks. Its age cannot be determined from the photograph and may range from recent growth to billions of years.
Uses & applications
Used as a decorative and collecting stone; quartz is also important in glassmaking, electronics, and industrial silica products.
Geological facts
Quartz is among Earth’s most abundant minerals and occurs in many colors and forms.
Field identification & locations
The pale, glassy appearance and lack of obvious cleavage are consistent with milky quartz, but visual identification is not definitive. It is widespread in veins and many rock types worldwide.
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Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
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Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
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Granite
Granite (Phaneritic intrusive igneous rock)
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