mineral

Quartz crystal with green mineral inclusions

Quartz (SiO₂), likely included with chlorite or another green phyllosilicate

AI-generated identification · may be incorrect

Hardness 7 Mohs; colorless to milky gray with blue-green inclusions; vitreous to drusy luster; trigonal crystal structure; no cleavage, conchoidal fracture. The granular coating appears to be microcrystalline quartz, possibly with green chlorite inclusions.

Identified September 22, 2026More mineral →

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Physical properties

Formation & geological history

Likely formed in a hydrothermal vein or cavity, where silica-rich fluids deposited quartz crystals and trapped green minerals. The specimen’s exact geological age and locality cannot be determined from the photograph.

Uses & applications

Used mainly as a mineral specimen or lapidary material; attractive included quartz may be used in jewelry, though this small rough piece has limited commercial application.

Geological facts

The green material may alternatively be epidote, celadonite, or copper-bearing minerals; chemical testing or locality information is needed for confident identification.

Field identification & locations

Look for glassy quartz, hardness sufficient to scratch glass, lack of cleavage, and hexagonal/prismatic crystal habits. Common sources include Brazil, Madagascar, China, India, and hydrothermal districts worldwide.