Clear Quartz Crystal (Rock Crystal)

Physical Properties

Hardness: 7 on Mohs scale; Color: Colorless/Transparent; Luster: Vitreous (glass-like); Crystal structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.65.

Formation & Geological History

Formed from silica-rich hydrothermal solutions or cooling magma in veins, geodes, and pegmatites. It can be found in rocks of all ages across the globe.

Uses & Applications

Used in electronics (oscillators), glassmaking, abrasives, jewelry (as a gemstone), and widely collected for metaphysical purposes or home decor.

Geological Facts

Quartz is the second most abundant mineral in Earth's continental crust. Its piezoelectric properties allow it to generate an electric charge under mechanical stress, which is why it is used in watches.

Field Identification & Locations

Identify in the field by its hardness (will scratch glass), hexagonal crystal points, and lack of cleavage planes. Found in mountainous regions, riverbeds, and as a primary component of many igneous rocks like granite.

Identified on: 4/28/2026

Mode: Standard