mineral

Quartz with a dark mineral inclusion

Milky quartz, likely containing a dark amphibole or tourmaline inclusion

AI-generated identification · may be incorrect

White to translucent quartz surrounding a dark gray-black inclusion; quartz has Mohs hardness 7, vitreous luster, and no cleavage. The inclusion cannot be identified confidently from the image.

Identified October 7, 2026More mineral →

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Physical properties

White to translucent quartz surrounding a dark gray-black inclusion; quartz has Mohs hardness 7, vitreous luster, and no cleavage. The inclusion cannot be identified confidently from the image.

Formation & geological history

Quartz crystallized from silica-rich fluids in a vein or cavity; dark minerals may have been trapped during growth. The specimen’s age and precise formation setting cannot be determined visually.

Uses & applications

Primarily a collecting specimen; quartz is also used in glassmaking, electronics, and decorative stone.

Geological facts

Quartz commonly encloses other minerals as crystals grow, producing striking contrasting inclusions.

Field identification & locations

Look for glassy luster, hardness sufficient to scratch glass, and irregular fracture rather than cleavage. Such quartz occurs in veins and pegmatites worldwide; identify the dark inclusion by testing or laboratory analysis.