mineral

Likely quartz-rich stone or pale feldspar fragment

Indeterminate; possibly quartz (SiO₂) or feldspar (KAlSi₃O₈–NaAlSi₃O₈)

AI-generated identification · may be incorrect

Small off-white, opaque-to-translucent angular fragment with a dull to weakly vitreous luster; apparent hardness is roughly 6–7 Mohs, but lighting limits identification. Crystal structure and cleavage cannot be confirmed from the image.

Identified September 15, 2026More mineral →

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Physical properties

Formation & geological history

Likely broken from a quartz vein, granite, pegmatite, or feldspar-bearing rock; such minerals formed in igneous or hydrothermal environments, commonly hundreds of millions to billions of years ago.

Uses & applications

Common quartz and feldspar are used in glass, ceramics, abrasives, and construction aggregate; this fragment has little jewelry or industrial value.

Geological facts

Quartz typically fractures conchoidally and lacks cleavage, while feldspar commonly shows two cleavage planes and breaks into blocky pieces.

Field identification & locations

Test hardness against glass, inspect for cleavage, and use a flashlight for translucency; a streak test and close-up crystal surfaces would improve identification. Quartz and feldspar occur worldwide, especially in granites, pegmatites, and metamorphic rocks.