Clear Quartz

Physical Properties

Hardness: 7 (Mohs scale); Color: Colorless/Transparent; Luster: Vitreous (glassy); Crystal Structure: Hexagonal (trigonal); Cleavage: Indistinct; Specific Gravity: 2.65

Formation & Geological History

Formed through the cooling of silica-rich magma or through hydrothermal activity in veins. It is found in igneous, metamorphic, and sedimentary rocks across all geological ages.

Uses & Applications

Used in electronics (as oscillators), optical instruments, glass manufacturing, abrasives, and widely in jewelry and metaphysical collections.

Geological Facts

Quartz is the second most abundant mineral in Earth's continental crust. Pure quartz is traditionally called rock crystal or clear quartz.

Field Identification & Locations

Identify by its ability to scratch glass and lack of cleavage. Often found in geodes or as tumbled stones in riverbeds. Common worldwide, especially in Brazil, Arkansas (USA), and Madagascar.

Identified on: 5/10/2026

Mode: Standard