mineral

Quartz Druzy (Geode Fragment)

Silicon Dioxide (SiO2)

Hardness: 7 (Mohs); Color: White to colorless; Luster: Vitreous (glassy); Crystal Structure: Hexagonal (trigonal); Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65

Hardness: 7 (Mohs)
Color: White to colorless
Luster: Vitreous (glassy)

Identified July 1, 2026More mineral →

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Physical properties

Hardness: 7 (Mohs); Color: White to colorless; Luster: Vitreous (glassy); Crystal Structure: Hexagonal (trigonal); Cleavage: None/Conchoidal fracture; Specific Gravity: 2.65

Formation & geological history

Formed from silica-rich hydrothermal fluids depositing in rock cavities or gas bubbles in volcanic rock. The tiny crystals (druzy) grow over thousands of years as the solution cools or evaporates.

Uses & applications

Commonly used in jewelry (as pendants or earrings), ornamental decor, and mineral collections. Industrial quartz is used in glassmaking and electronics.

Geological facts

Quartz is one of the most abundant minerals on Earth. Druzy crystals are highly prized by jewelers because they provide a lot of surface area for reflecting light, creating a glittery effect.

Field identification & locations

Identify by its 'sugar-like' crystalline surface that sparkles under light. It will scratch glass but cannot be scratched by a steel knife. Commonly found in Brazil, Mexico, and the USA.