mineral

Clear quartz fragment

Quartz (silicon dioxide, SiO₂)

AI-generated identification · may be incorrect

Translucent to clear, vitreous luster, commonly hexagonal crystal structure, Mohs hardness 7, no true cleavage and conchoidal fracture; specific gravity about 2.65. The irregular shape suggests a broken or tumbled fragment, possibly with surface coating or residue.

Identified September 1, 2026More mineral →

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Physical properties

Formation & geological history

Forms in igneous, metamorphic, and hydrothermal veins when silica-rich fluids crystallize; quartz is common from Precambrian to recent ages. The photograph alone cannot establish a precise variety or locality.

Uses & applications

Used for glass, electronics, abrasives, and engineered stone; attractive clear pieces are collected or used as inexpensive lapidary material. This small fragment has minimal commercial value.

Geological facts

Quartz may show internal fractures, bubbles, or inclusions and can resemble man-made glass. Unlike glass, it is harder and commonly displays angular crystal faces or conchoidal fracture.

Field identification & locations

Likely quartz if it scratches ordinary glass and does not scratch with a steel blade; inspect for hexagonal faces and absence of bubbles. Common worldwide, especially in granite, pegmatites, veins, and quartz beaches.