mineral

Blue-gray druzy quartz geode fragment

Quartz, SiO₂, lining a geode; possibly chalcedony with druzy quartz crystals

AI-generated identification · may be incorrect

Pale blue-gray, translucent to opaque quartz with a vitreous luster and fine crystal lining; Mohs hardness 7, trigonal crystal system, no true cleavage, conchoidal fracture. The dark outer rind may be host rock or iron/manganese staining.

Identified October 16, 2026More mineral →

Explore Blue-gray druzy quartz geode fragment 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

Silica-rich fluids deposited quartz in a cavity within host rock, forming a crystal-lined geode. Such geodes occur in rocks of many ages; this specimen’s age and exact host cannot be determined from the image.

Uses & applications

Primarily a low-cost display or collecting specimen; geode material is also used for polished decor and, when attractive, jewelry.

Geological facts

Druzy describes a surface covered with many tiny crystals rather than one large crystal.

Field identification & locations

Identify by the glassy, hard, crystal-lined interior and contrasting outer rind; geodes are common in volcanic rocks and sedimentary deposits worldwide. The image does not establish the exact mineral or locality.