mineral

Clear Quartz Crystal Cluster

Silicon Dioxide (SiO2)

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

Hardness: 7 on Mohs scale
Color: Colorless/Transparent
Luster: Vitreous (glassy)

Identified May 9, 2026More mineral →

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Physical properties

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

Formation & geological history

Formed through hydrothermal processes where silica-rich hot water fills veins and cavities in crustal rocks. Can form in igneous, metamorphic, and sedimentary environments over millions of years as the solution cools and crystallizes.

Uses & applications

Used in electronics for its piezoelectric properties (watches, radios), high-end glass manufacturing, jewelry, and as a popular specimen for mineral collectors and metaphysical practices.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Its name comes from the German word 'quarz'. If squeezed, it can generate an electric voltage, a property known as piezoelectricity.

Field identification & locations

Identified by its hexagonal crystal habit, hardness (will scratch glass), and lack of cleavage. Commonly found in mountainous regions globally, notably Arkansas (USA), Brazil, and Madagascar. Look for pointed prism shapes with striations across the faces.