Quartz (Smoky/Milky variety with inclusion)

Physical Properties

Hardness: 7 (Mohs scale); Color: Grayish-white to tan with brownish iron staining; Luster: Vitreous (glassy) to greasy; Crystal Structure: Trigonal/Hexagonal; Cleavage: None (conchoidal fracture); Specific Gravity: 2.65.

Formation & Geological History

Formed from the crystallization of silica-rich magma or hydrothermal fluids in veins. This specimen likely originated in a pegmatite or hydrothermal vein environment, possibly billions to millions of years old depending on the local geology.

Uses & Applications

Quartz is used in glassmaking, electronics (piezoelectric properties), abrasives, and as a popular gemstone for jewelry or metaphysical collecting.

Geological Facts

Quartz is the second most abundant mineral in Earth's continental crust. Its name comes from the German word 'Quarz', which has Slavic origins meaning 'hard'.

Field Identification & Locations

Identify in the field by its hardness (it will scratch glass), lack of cleavage, and glassy luster. It is commonly found in granitic terrain, river beds, and mountainous regions worldwide.

Identified on: 4/17/2026

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