mineral

Clear Quartz Crystal on Matrix

SiO2 (Silicon Dioxide)

Hardness: 7 on Mohs scale; Color: Colorless/transparent with brownish matrix; Luster: Vitreous (glassy); Crystal structure: Hexagonal/Trigonal; Cleavage: None/Conchoidal fracture; Specific gravity: 2.65

Hardness: 7 on Mohs scale
Color: Colorless/transparent with brownish matrix
Luster: Vitreous (glassy)

Identified July 20, 2026More mineral →

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Physical properties

Formation & geological history

Formed through the crystallization of silica-rich solutions in hydrothermal veins or igneous pegmatites. This specimen likely developed in an open cavity or vug, allowing for the formation of distinct crystal faces.

Uses & applications

Used in electronics for its piezoelectric properties, glassmaking, optical instruments, jewelry, and widely collected as a metaphysical or decorative specimen.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Clear quartz is often called 'Rock Crystal.' It has been used since antiquity for carvings and crystal balls.

Field identification & locations

Identify in the field by its hexagonal crystal habit, lack of cleavage, and ability to scratch glass. Commonly found worldwide, with major deposits in Brazil and Arkansas, USA.

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