mineral

Milky quartz (likely)

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

White to translucent, vitreous-to-waxy luster, and irregular conchoidal fracture; quartz is Mohs hardness 7, has no cleavage, hexagonal crystal structure, and specific gravity about 2.65. The rough, cloudy appearance is caused by microscopic fluid inclusions or structural defects.

Identified August 26, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich fluids crystallize in veins, cavities, and pegmatites, commonly in igneous and metamorphic rocks. Quartz is geologically widespread and forms throughout Earth history; the specimen’s exact age cannot be determined from the photograph.

Uses & applications

Used in glass, ceramics, abrasives, electronics, and engineered stone; attractive pieces are collected or used decoratively. This fragment appears common and has little gem value.

Geological facts

The image is consistent with milky quartz, but a photograph cannot exclude white calcite, gypsum, or glass. Quartz should scratch ordinary steel or glass, whereas calcite reacts with dilute hydrochloric acid and is much softer.

Field identification & locations

Common worldwide, especially in hydrothermal veins and granitic pegmatites. Check for glassy fracture, lack of cleavage, and hardness; avoid destructive tests on valuable specimens.