mineral
Likely quartz-bearing mineral aggregate
Quartz (SiO₂), possibly mixed with mica or feldspar
AI-generated identification · may be incorrectSmall gray-white, granular to crystalline specimen with a vitreous to slightly dull luster; quartz hardness is Mohs 7, lacks cleavage, and has a hexagonal crystal structure. The image is insufficient to determine exact composition or specific gravity.
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Physical properties
Small gray-white, granular to crystalline specimen with a vitreous to slightly dull luster; quartz hardness is Mohs 7, lacks cleavage, and has a hexagonal crystal structure. The image is insufficient to determine exact composition or specific gravity.
Formation & geological history
Likely formed in a hydrothermal vein or granitic pegmatite as intergrown crystals; age depends on its host geology and cannot be established visually. Commonly associated minerals include feldspar, mica, and sulfides.
Uses & applications
Usually collected as a micro-mineral specimen; quartz-rich material is used in glass, ceramics, electronics, abrasives, and construction, while clear crystals may be used decoratively or as gemstones.
Geological facts
The rough, sugary texture suggests an aggregate rather than a single crystal. A glassy luster and resistance to scratching are useful clues, but testing is needed for confident identification.
Field identification & locations
Common in quartz veins, pegmatites, granites, and metamorphic rocks worldwide. Test with a steel nail or knife cautiously, inspect under magnification, and use streak, acid, or specific-gravity tests to distinguish feldspar and calcite.
