mineral

Milky quartz (probable)

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

White to translucent, vitreous luster, uneven to conchoidal fracture, no obvious cleavage; Mohs hardness 7 and specific gravity about 2.65. The granular, pale appearance may also indicate quartz-rich rock such as quartzite.

Identified September 7, 2026More mineral →

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Physical properties

Formation & geological history

Forms when silica-rich fluids crystallize in veins, cavities, or igneous rocks; quartz is geologically widespread from Precambrian to modern formations. Exact age and whether this is a single crystal or quartzite cannot be determined from the image.

Uses & applications

Common quartz is used in glass, ceramics, abrasives, engineered stone, and electronics; attractive pieces are collected or used decoratively. This small rough specimen has modest commercial value.

Geological facts

Quartz is one of Earth’s most abundant minerals and is piezoelectric, producing an electrical charge under pressure. Milky color results mainly from microscopic fluid inclusions and structural defects.

Field identification & locations

Identify it by its glassy luster, hardness sufficient to scratch ordinary glass, lack of cleavage, and white translucency; avoid confusing it with calcite, which is softer and cleaves readily. Common worldwide, especially in hydrothermal veins and granite-related regions.