Gray Agate with Druzy Quartz Geode

Physical Properties

Mohs hardness: 6.5-7; Color: Gray, bluish-gray; Luster: Waxy to vitreous; Crystal structure: Trigonal/Microcrystalline; Cleavage: None; Specific Gravity: 2.58-2.64

Formation & Geological History

Formed in cavities of volcanic host rocks through the deposition of silica from groundwater. The internal cavity contains a druzy druse of tiny quartz crystals.

Uses & Applications

Ornamental carvings, decorative items, jewelry, and metaphysical collecting.

Geological Facts

Agate is a variety of chalcedony. This specific piece is a 'druzy agate', where the internal hollow of a geode has been exposed and carved into an owl shape.

Field Identification & Locations

Identified by its waxy luster, translucency, and the presence of micro-crystals in the pocket (vug). Common in Brazil, Uruguay, and India.

Identified on: 5/3/2026

Mode: Standard