mineral

Massive quartz (milky quartz), possibly quartz-rich mineral aggregate

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

Typically Mohs hardness 7, white to translucent, with a vitreous-to-waxy luster; lacks cleavage and shows conchoidal fracture. The specimen appears granular, uneven, and possibly coated or weathered, so crystal form is not clearly visible.

Identified September 6, 2026More mineral →

Explore Massive quartz (milky quartz), possibly quartz-rich mineral aggregate in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Quartz commonly crystallizes from silica-rich hydrothermal fluids, pegmatites, and cavities in igneous rocks, or accumulates in quartz veins; its age depends on the host formation and cannot be determined from the photograph.

Uses & applications

Used in glass, ceramics, foundry sand, electronics, countertops, and abrasives; attractive translucent pieces are collected, though this rough specimen has limited gem use.

Geological facts

Milky appearance results from microscopic fluid inclusions, fractures, or impurities that scatter light. Quartz is one of Earth’s most abundant and chemically resistant minerals.

Field identification & locations

Identify with hardness testing: it should scratch ordinary glass, while a steel knife generally will not scratch it; it has no acid reaction and commonly leaves a white streak. Common worldwide in quartz veins, granite pegmatites, and metamorphic rocks.