mineral

Quartz Druzy (Geode Fragment)

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: Clear to white; Luster: Vitreous to sparkling; Crystal Structure: Hexagonal (trigonal); Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Hardness: 7 on Mohs scale
Color: Clear to white
Luster: Vitreous to sparkling

Identified May 27, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Clear to white; Luster: Vitreous to sparkling; Crystal Structure: Hexagonal (trigonal); Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Formation & geological history

Formed by the precipitation of silica-rich hydrothermal fluids in rock cavities or gas bubbles (vesicles) in volcanic rock. These fragments appear to be part of a broken-open geode.

Uses & applications

Primarily used for jewelry, lapidary art, and as decorative collector specimens. Industrial-grade quartz is used in electronics and glass manufacturing.

Geological facts

The word 'druzy' refers to a coating of fine crystals on a rock surface. Quartz is one of the most abundant and diverse minerals on Earth's crust.

Field identification & locations

Identify by its characteristic 'sugar-like' sparkle and hardness (it will scratch glass). Commonly found in sedimentary geodes or volcanic vugs. Collectors look for uniform crystal coverage and cleanliness.