mineral
Milky quartz cluster on dark matrix
Quartz (SiO₂), likely with a dark mica- or amphibole-bearing host rock
AI-generated identification · may be incorrectWhite to translucent, vitreous luster, typically hardness 7 on Mohs scale and trigonal crystal structure; quartz lacks cleavage and breaks with conchoidal fracture. The image shows a rough cluster attached to a dark matrix, though exact crystal habit is unclear.
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Physical properties
White to translucent, vitreous luster, typically hardness 7 on Mohs scale and trigonal crystal structure; quartz lacks cleavage and breaks with conchoidal fracture. The image shows a rough cluster attached to a dark matrix, though exact crystal habit is unclear.
Formation & geological history
Quartz commonly crystallizes from silica-rich hydrothermal fluids in fractures and cavities; its age and precise formation setting cannot be determined from the image.
Uses & applications
Quartz is used in glassmaking, electronics, and decorative objects; attractive clusters are collected or displayed.
Geological facts
Milky appearance results from microscopic fluid or gas inclusions that scatter light.
Field identification & locations
Look for glassy luster, hardness sufficient to scratch ordinary glass, and no cleavage; common worldwide in veins and geodes. The pictured specimen’s exact locality and matrix are uncertain.
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Epidote
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Granite
Granite (Phaneritic intrusive igneous rock)
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