mineral

Milky quartz (likely weathered quartzite or quartz vein fragment)

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

Hardness 7; white to translucent gray, vitreous to waxy luster, irregular fracture, no cleavage, and commonly hexagonal crystal structure. The porous, iron-stained surface suggests weathering or a quartz-rich rock matrix.

Identified August 9, 2026More mineral →

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Physical properties

Formation & geological history

Quartz crystallizes from silica-rich hydrothermal fluids or forms in igneous and metamorphic rocks; the specimen likely comes from an ancient quartz vein or quartzite exposed and weathered at the surface. Exact age cannot be determined visually.

Uses & applications

Used for glass, ceramics, abrasives, engineered stone, and electronics; attractive translucent pieces are collected or used decoratively, though this specimen is not gem grade.

Geological facts

Quartz is one of Earth’s most abundant minerals and is piezoelectric, producing an electrical charge when mechanically stressed.

Field identification & locations

Identify by its glassy appearance, lack of cleavage, and ability to scratch ordinary glass; it should not be confused with calcite, which is softer and cleaves readily. Common worldwide, especially in hydrothermal veins and quartz-rich metamorphic terrains.