mineral

White quartz geode nodule

Quartz (SiO₂), likely a quartz-lined geode or vug in a host rock

AI-generated identification · may be incorrect

White, opaque-to-translucent quartz with a vitreous luster and irregular crystalline cavity; quartz hardness is 7 Mohs, with trigonal crystal structure and no cleavage. The enclosing material and exact mineral mix cannot be determined from the image alone.

Identified October 4, 2026More mineral →

Explore White quartz geode nodule 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 precipitated from silica-rich fluids into a cavity in rock, commonly during late-stage volcanic or hydrothermal activity. Its age depends on the host deposit and cannot be established visually.

Uses & applications

Small examples are chiefly decorative or collectible; quartz is also widely used in glassmaking, electronics, and industrial applications.

Geological facts

The cavity is a vug-like opening containing small crystals, rather than a fully hollow, sealed geode.

Field identification & locations

Look for hardness near 7, glassy luster, and quartz crystals lining the cavity; quartz geodes occur worldwide, including in volcanic and sedimentary deposits. A photo cannot confirm the host rock or whether the white exterior is quartz.