mineral
Milky quartz
Quartz (silicon dioxide, SiO₂)
AI-generated identification · may be incorrectHardness 7 Mohs; white to cream, vitreous to dull luster, translucent patches, and no cleavage. It has a hexagonal crystal structure, though this specimen is massive and irregular.
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Physical properties
Hardness 7 Mohs; white to cream, vitreous to dull luster, translucent patches, and no cleavage. It has a hexagonal crystal structure, though this specimen is massive and irregular.
Formation & geological history
Likely formed as quartz filling fractures or crystallizing in a pegmatite or hydrothermal vein; its precise age and setting cannot be determined from the image.
Uses & applications
Quartz is used in glassmaking, electronics, and decorative stone; this small rough specimen is mainly suitable for collecting or display.
Geological facts
Milky color results from microscopic fluid or gas inclusions that scatter light.
Field identification & locations
Look for glassy translucence, hardness sufficient to scratch glass, and lack of cleavage; common worldwide in veins and igneous or metamorphic rocks. The image supports a visual identification, but not confirmation by testing.
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Epidote
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Pegmatite with Tourmaline and Quartz
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Granite
Granite (Phaneritic intrusive igneous rock)
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