mineral

Druzy quartz on a yellow-brown host, likely agate or chalcedony

Quartz, SiO₂; microscopic drusy quartz crystals coating chalcedony

AI-generated identification · may be incorrect

Colorless to pale honey crystals with a vitreous, glittering luster and tiny hexagonal crystal points. Quartz hardness is 7 Mohs; the visible coating appears mounted on or part of a polished host, so the host’s identity is uncertain.

Identified October 14, 2026More mineral →

Explore Druzy quartz on a yellow-brown host, likely agate or chalcedony in the encyclopedia →

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Physical properties

Formation & geological history

Druzy quartz forms when silica-rich fluids deposit many small quartz crystals on a cavity surface, often in volcanic or hydrothermal settings. The image does not reveal the specimen’s age or exact locality.

Uses & applications

Collected as a decorative specimen and used in jewelry, including pendants and cabochons; quartz is also widely used in glassmaking and electronics.

Geological facts

“Druzy” describes a coating of numerous small crystals rather than a separate mineral species. The yellow color may come from iron staining or treatment, which cannot be confirmed visually.

Field identification & locations

Look for a sparkling surface of tightly packed, individually faceted crystals; quartz typically scratches glass and has no cleavage. Druzy quartz is common in geodes and chalcedony deposits worldwide.