mineral

Quartz-rich rock, likely milky quartz with iron staining

Quartz (SiO₂), possibly quartzite or quartz vein material

AI-generated identification · may be incorrect

White to translucent, vitreous-to-dull luster, massive granular texture, no obvious cleavage, and hardness about 7 Mohs; yellow-orange and brown areas are likely iron-oxide staining. Specific gravity is approximately 2.65.

Identified September 16, 2026More mineral →

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Physical properties

Formation & geological history

Likely formed as hydrothermal quartz filling a fracture or as metamorphosed quartz-rich rock; the image cannot establish a precise geological age. Commonly associated with weathered veins in igneous, metamorphic, and sedimentary terrains.

Uses & applications

Quartz is used in glass, ceramics, electronics, abrasives, and construction aggregate; attractive pieces may be used as lapidary specimens or décor, though this example appears ordinary and unpolished.

Geological facts

Quartz breaks with a conchoidal to irregular fracture and commonly develops milky opacity from microscopic fluid inclusions. Iron oxides such as limonite or hematite produce the rusty yellow-brown coloration.

Field identification & locations

Identify it by its glassy fracture, lack of cleavage, light streak, and inability to scratch it with a steel knife; confirm with a hardness test and inspect for distinct grains if testing for quartzite. Common worldwide, especially in exposed mineral veins.