mineral

Clear Quartz

Silicon Dioxide (SiO2)

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

Hardness: 7 on Mohs scale
Color: Colorless to transparent
Luster: Vitreous (glassy)

Identified May 2, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed in a wide range of environments, primarily through the cooling of silica-rich magma or from hydrothermal vents. It is one of the most abundant minerals in the Earth's crust, found in igneous, metamorphic, and sedimentary rocks.

Uses & applications

Used in electronics (as a piezoelectric material), glassmaking, abrasive blasting, and as a gemstone for jewelry and ornamental carving.

Geological facts

Clear Quartz is often called Rock Crystal. For centuries, it was believed to be permanently frozen ice because of its transparency and coolness to the touch.

Field identification & locations

Identify in the field by its hardness (scratches glass), lack of cleavage, and hexagonal crystal habits. Commonly found in mountainous regions, riverbeds, and as part of granite outcrops.