mineral

Likely quartz-rich stone (possibly milky quartz or quartzite)

Quartz, silicon dioxide (SiO₂), or quartzite if interlocking grains are present

AI-generated identification · may be incorrect

Pale gray-white, translucent to opaque, with a vitreous to dull luster and irregular conchoidal fracture; quartz hardness is Mohs 7, with no cleavage and specific gravity about 2.65. The image is insufficient to confirm crystal faces or texture.

Identified August 25, 2026More mineral →

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Physical properties

Formation & geological history

Quartz crystallizes from silica-rich hydrothermal fluids or igneous melts; quartzite forms when sandstone is metamorphosed. Formation ages may range from Precambrian to recent depending on locality.

Uses & applications

Common quartz is used in glass, ceramics, abrasives, electronics, and construction aggregate; attractive pieces may be used as mineral specimens or cabochons.

Geological facts

Quartz is one of Earth’s most abundant minerals and commonly occurs in veins, igneous rocks, metamorphic rocks, and sedimentary deposits.

Field identification & locations

Test with a steel knife: genuine quartz should resist scratching; it can scratch glass, though surface coatings or similar minerals may confuse this test. Common locations include Brazil, the United States, Madagascar, and worldwide quartz-bearing terrains.