mineral
Milky quartz
Quartz, silicon dioxide (SiO₂)
AI-generated identification · may be incorrectWhite to translucent, vitreous-to-waxy luster, irregular fracture, and no cleavage; Mohs hardness 7, trigonal crystal structure, specific gravity about 2.65. The specimen appears rough and fractured, though identification from an image is uncertain.
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Physical properties
White to translucent, vitreous-to-waxy luster, irregular fracture, and no cleavage; Mohs hardness 7, trigonal crystal structure, specific gravity about 2.65. The specimen appears rough and fractured, though identification from an image is uncertain.
Formation & geological history
Forms when silica-rich fluids crystallize in veins and cavities, or during igneous and metamorphic processes. Quartz is widespread across rocks of many geological ages.
Uses & applications
Commonly used for carving, ornaments, and collector specimens; industrial quartz is used in glassmaking and electronics.
Geological facts
Quartz is one of Earth’s most abundant minerals and occurs in many colors and forms.
Field identification & locations
Look for its glassy appearance, lack of cleavage, and ability to scratch ordinary glass; common worldwide in veins, pegmatites, and host rocks. The pictured white material is consistent with quartz, but visual inspection alone cannot confirm it.
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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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