mineral
Quartz Druzy on Matrix
SiO2
Hardness of 7 on the Mohs scale, vitreous luster, hexagonal crystal structure, conchoidal fracture, varies from transparent to translucent, specific gravity of 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, vitreous luster, hexagonal crystal structure, conchoidal fracture, varies from transparent to translucent, specific gravity of 2.65.
Formation & geological history
Forms in hydrothermal veins, pegmatites, and as linings in geodes or vugs in various rock types. Age can vary from Precambrian to Recent.
Uses & applications
Used in jewelry, decorative items, electronics, glassmaking, and as a popular collectible.
Geological facts
Druzy refers to a coating of fine crystals on a rock fracture surface, vein, or within a geode. Quartz is the most common mineral found in the Earth's continental crust.
Field identification & locations
Identified by its hexagonal crystal habit, hardness (scratches glass), and vitreous luster. Common in many geological environments globally.
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