Clear Quartz

Physical Properties

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

Formation & Geological History

Forms in igneous, metamorphic, and sedimentary environments. Most clear quartz crystallizes from hydrothermal veins or cooling silica-rich magma (pegmatites). It can form over millions of years and is found in rocks of all geological ages.

Uses & Applications

Used in electronics as oscillators (piezoelectric properties), glassmaking, abrasives, and as a gemstone for jewelry, carvings, and crystal healing collections.

Geological Facts

Quartz is the second most abundant mineral in the Earth's continental crust. Ancient Greeks believed clear quartz was deeply frozen ice that would never melt.

Field Identification & Locations

Identified by its ability to scratch glass, its lack of cleavage (it breaks in curved, shell-like fractures), and its typical six-sided hexagonal crystal habit. Found globally, especially in mountain ranges like the Alps and Arkansas, USA.

Identified on: 4/28/2026

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