mineral
Likely quartz-rich mineral specimen
Quartz (SiO₂), possibly milky quartz or quartz-bearing rock
AI-generated identification · may be incorrectWhitish to translucent, glassy-to-waxy luster, irregular fracture, and no obvious cleavage; quartz has Mohs hardness 7 and specific gravity about 2.65. The image is insufficient to confirm crystal shape or identify impurities.
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Physical properties
Whitish to translucent, glassy-to-waxy luster, irregular fracture, and no obvious cleavage; quartz has Mohs hardness 7 and specific gravity about 2.65. The image is insufficient to confirm crystal shape or identify impurities.
Formation & geological history
Quartz commonly crystallizes from silica-rich hydrothermal fluids, pegmatites, and cavities in igneous or metamorphic rocks; individual crystals may form over millions of years. Geological age cannot be determined from the photograph.
Uses & applications
Common quartz is used in glass, ceramics, abrasives, electronics, and countertops; attractive crystals are collected or used as lapidary material. This small rough specimen likely has modest decorative value.
Geological facts
Quartz is one of Earth’s most abundant minerals and occurs in many colors, including amethyst, citrine, rose quartz, and smoky quartz. Its absence of cleavage and ability to scratch ordinary glass help distinguish it from many pale minerals.
Field identification & locations
Common worldwide, including Brazil, Arkansas, Madagascar, and alpine regions. Confirm with a glass-scratch test and inspection for hexagonal crystal faces; avoid testing if the specimen is valuable or coated.
