mineral

Botryoidal Quartz Cluster (Druzy Stalactitic Quartz)

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Mohs hardness: 7. Color: off-white, light tan, translucent to milky white. Luster: vitreous to sugary/sparkly (druzy). Crystal system: trigonal/hexagonal. Form: botryoidal, rounded nodules, aggregate stalactitic crust.

Hardness: 7
Color: off-white, light tan, translucent to milky white
Luster: vitreous to sugary/sparkly (druzy)

Identified July 26, 2026More mineral →

Explore Botryoidal Quartz Cluster (Druzy Stalactitic Quartz) 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

Formed via secondary mineral precipitation from silica-rich hydrothermal fluid or low-temperature groundwater inside volcanic cavities (geodes), solution pockets, or sedimentary voids.

Uses & applications

Popular display mineral specimen for lapidary collectors, interior decor, and metaphysical collections. Fine quartz is also used in electronics and glass manufacturing.

Geological facts

The rounded, grape-like growth habit is called 'botryoidal'. Small micro-crystals coating the surface give it a shimmering, 'druzy' appearance under direct light.

Field identification & locations

Identified by its cauliflower-like or grape-bunch botryoidal texture coated with fine quartz crystals that easily scratch glass (hardness 7). Commonly found in geode beds across Missouri, Iowa (Keokuk geodes), Brazil, and Uruguay.