mineral

Quartz Crystal Cluster

Silicon Dioxide (SiO2)

Hardness: 7 on Mohs scale; Color: Clear to white (milky) with iron staining (yellow/orange); Luster: Vitreous (glassy); Crystal Structure: Hexagonal; Specific Gravity: 2.65

Hardness: 7 on Mohs scale
Color: Clear to white (milky) with iron staining (yellow/orange)
Luster: Vitreous (glassy)

Identified July 15, 2026More mineral →

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Physical properties

Hardness: 7 on Mohs scale; Color: Clear to white (milky) with iron staining (yellow/orange); Luster: Vitreous (glassy); Crystal Structure: Hexagonal; Specific Gravity: 2.65

Formation & geological history

Formed from hydrothermal solutions in veins or cavities as magma cools or during metamorphic processes. This cluster likely grew in a pocket of an igneous rock or sedimentary vein.

Uses & applications

Used in electronics as piezoelectric components, glass manufacturing, abrasives, and highly sought after by mineral collectors for aesthetics.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. Its name comes from the German word 'quarz', which originally meant 'hard'.

Field identification & locations

Identified in the field by its crystal habit (six-sided prisms) and its ability to scratch glass. Widely found globally, notably in Brazil, USA (Arkansas/New York), and the Alps.