mineral

Druzy quartz geode slice

Quartz, silicon dioxide (SiO₂), commonly lining a chalcedony- or quartz-rich geode

AI-generated identification · may be incorrect

Identified September 7, 2026More mineral →

Explore Druzy quartz geode slice in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

White to gray microcrystalline quartz druse coats a darker host or agate-like base; vitreous to sugary luster, hexagonal quartz structure, Mohs hardness 7, no cleavage, conchoidal fracture, and specific gravity about 2.65. The upright slab appears cut and polished on one side, with sparkling quartz crystals on the exposed edge.

Formation & geological history

Silica-rich groundwater filled cavities in volcanic rock or formed within chalcedony, depositing quartz crystals over time; the exact age and host locality cannot be determined from the image. Common formation environments include basaltic lava flows and hydrothermal veins.

Uses & applications

Used as a decorative display specimen, bookend, or lapidary piece; druzy quartz is also used in jewelry and ornamental objects.

Geological facts

The glitter comes from thousands of tiny quartz crystal terminations reflecting light. Dark coloration may represent iron/manganese-bearing chalcedony, matrix, or applied enhancement.

Field identification & locations

Identify by abundant sparkling quartz, hardness sufficient to scratch glass, and lack of metallic or cubic crystal forms; common sources include Brazil, Uruguay, Mexico, Morocco, and the western United States.