mineral

Raw quartz fragment

Quartz (SiO₂), likely milky or included quartz

AI-generated identification · may be incorrect

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.

Identified September 12, 2026More mineral →

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Physical properties

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.