mineral
Raw quartz fragment
Quartz (SiO₂), likely milky or included quartz
AI-generated identification · may be incorrectHardness 7 Mohs; translucent cream-white color, vitreous to dull luster, uneven conchoidal fracture, and no obvious cleavage. The rough triangular fragment appears granular or slightly weathered, with possible iron or clay inclusions.
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Physical properties
Hardness 7 Mohs; translucent cream-white color, vitreous to dull luster, uneven conchoidal fracture, and no obvious cleavage. The rough triangular fragment appears granular or slightly weathered, with possible iron or clay inclusions.
Formation & geological history
Quartz crystallizes from silica-rich igneous and hydrothermal fluids and also forms in sedimentary and metamorphic rocks; specimens may range from ancient to geologically recent. This small piece may be vein quartz or a naturally broken crystal.
Uses & applications
Used in glass, ceramics, electronics, abrasives, countertops, and as a gemstone or mineral specimen. This fragment has modest decorative or educational value.
Geological facts
Quartz is one of Earth’s most abundant minerals and is piezoelectric, producing an electrical charge under pressure. Its crystal symmetry is trigonal, though this broken piece does not show crystal form clearly.
Field identification & locations
Common worldwide, especially in hydrothermal veins, granite pegmatites, and quartz-rich metamorphic rocks. A glass-scratch test, lack of cleavage, and conchoidal fracture help distinguish it from calcite, though testing may damage the specimen.
