metamorphic

Quartz vein rock

Milky quartz with smoky quartz; chiefly silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

Hardness about 7 Mohs; white to gray-brown, with a vitreous to dull luster and uneven fracture. Quartz is trigonal, but individual crystals are not clearly visible here; associated white material may include feldspar or other minerals.

Identified September 30, 2026More metamorphic →

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Physical properties

Formation & geological history

Likely quartz precipitated from silica-rich fluids in a fracture, possibly within metamorphic or igneous host rock. Quartz veins form across many geological ages; the specimen’s age and exact setting cannot be determined from the image.

Uses & applications

Quartz is used in glass, electronics, abrasives, and as a decorative or collectible material; attractive pieces may be polished.

Geological facts

Milky color results from tiny fluid or gas inclusions; smoky coloration commonly develops from natural irradiation of trace elements in quartz.

Field identification & locations

Look for hardness near 7, glassy luster, and fracture surfaces that do not show cleavage. Quartz veins occur worldwide; the image does not establish a locality or confirm the identity of the surrounding minerals.