mineral

Milky quartz pebble

Quartz (SiO₂), likely massive or microcrystalline quartz

AI-generated identification · may be incorrect

White to translucent, glassy-to-waxy luster, irregular granular surface, and no obvious cleavage; hardness 7 Mohs, trigonal crystal structure, and specific gravity about 2.65. The small rounded form suggests natural abrasion or tumbling.

Identified August 20, 2026More mineral →

Explore Milky quartz pebble 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 crystallizes from silica-rich igneous, metamorphic, or hydrothermal fluids and is highly resistant to weathering, accumulating in stream gravels and sediment. Its age cannot be determined from the photograph and may range from recent sediment to ancient bedrock-derived material.

Uses & applications

Common quartz is used in glassmaking, ceramics, abrasives, engineered stone, and electronics; attractive translucent pieces are sold as inexpensive décor or mineral specimens.

Geological facts

Milky appearance results from microscopic fluid inclusions, fractures, or defects scattering light. Quartz is one of Earth’s most abundant and chemically durable minerals.

Field identification & locations

Identify by its hardness—scratching ordinary glass—lack of cleavage, conchoidal fracture, and white translucent appearance; it is commonly found in veins, granite-derived gravels, and river deposits. The image alone cannot exclude a pale calcite or manufactured fragment.