mineral

Quartz (Druzy)

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: White to colorless with tan/brown iron staining; Luster: Vitreous (glassy); Crystal Structure: Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65

Hardness: 7 on Mohs scale
Color: White to colorless with tan/brown iron staining
Luster: Vitreous (glassy)

Identified June 28, 2026More mineral →

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Physical properties

Formation & geological history

Formed from silica-rich hydrothermal fluids cooling in cavities or veins within rocks. This specific specimen likely originated in a geode or vug within volcanic or sedimentary rock layers.

Uses & applications

Primarily used for mineral collecting, lapidary work, and decorative jewelry. Industrial quartz is used in glassmaking and electronics (piezoelectricity).

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Druzy refers to the coating of fine crystals on a rock surface, creating a glittery effect similar to sugar.

Field identification & locations

Identify in the field by its hardness (scratches glass), lack of reaction to acid, and hexagonal crystal terminations. Found globally, especially in mountain ranges and volcanic fields.