mineral
Likely quartz crystal
Quartz (SiO₂), possibly milky or iron-stained quartz
AI-generated identification · may be incorrectColorless to cream, translucent, with a glassy luster and probable conchoidal fracture; Mohs hardness 7, trigonal crystal structure, no cleavage, and specific gravity about 2.65. The image is somewhat blurred, so crystal faces and termination are uncertain.
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Physical properties
Colorless to cream, translucent, with a glassy luster and probable conchoidal fracture; Mohs hardness 7, trigonal crystal structure, no cleavage, and specific gravity about 2.65. The image is somewhat blurred, so crystal faces and termination are uncertain.
Formation & geological history
Quartz commonly crystallizes from silica-rich hydrothermal fluids in cavities, veins, and igneous rocks; individual crystals may range from recent growth to billions of years old depending on host rock.
Uses & applications
Used in glass, ceramics, abrasives, electronics, and watches; clear, well-formed crystals are collected and occasionally cut as gemstones. This small specimen has mainly curiosity value.
Geological facts
Quartz is one of Earth’s most abundant minerals and exhibits piezoelectricity. Its pointed form may indicate a natural crystal termination, though the specimen could also be a broken or polished piece.
Field identification & locations
Look for glassy luster, hardness sufficient to scratch ordinary glass, absence of cleavage, and diagnostic crystal faces or a pointed termination; common localities include Brazil, Madagascar, the United States, and Alpine regions.
