mineral

Smoky Quartz (Chlorite Inclusions)

Silicon Dioxide (SiO2) with trace Aluminum and Natural Irradiation

Hardness: 7 on Mohs scale; Color: Translucent smoky brown to near-black with green ‘moss’ inclusions; Luster: Vitreous (glass-like); Crystal structure: Hexagonal/Trigonal; Cleavage: None (conchoidal fracture); Specific gravity: 2.65.

Hardness: 7 on Mohs scale
Luster: Vitreous (glass-like)

Identified March 18, 2026More mineral →

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Physical properties

Formation & geological history

Formed in pegmatites and hydrothermal veins. The smoky color results from free silicon formed from silicon dioxide by natural irradiation of aluminum-bearing quartz. The green inclusions are typically Chlorite minerals (Phyllosilicates) that grew during or after the quartz formation.

Uses & applications

Used primarily for crystal healing, high-end interior decoration, gemstone carving, and mineral collecting. Industrially, quartz is used in electronics and glass-making, though specimens with inclusions like this one are valued for their aesthetic appeal.

Geological facts

Specimens from the Himalayan regions are highly prized for their deep smoky tones and phantom inclusions. Some 'smoky' appearance can be artificially enhanced through gamma irradiation, though natural pieces like the one pictured often show color zoning.

Field identification & locations

Identify in the field by its distinct 6-sided crystal shape, horizontal striations on face facets, and its ability to scratch glass. Look for internal 'phantoms' or green mossy patches within the brown-tinted crystal. Common locations include Brazil, the Alps, Colorado (USA), and the Himalayas.

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