metamorphic

Quartz-rich metamorphic rock, likely quartzite or quartz-veined schist

Quartz (SiO₂) with mica/chlorite-rich schistose matrix; possibly minor feldspar and sulfides

AI-generated identification · may be incorrect

Hardness about 2–7 depending on minerals; white to gray translucent quartz has vitreous luster, while the dark matrix is micaceous and foliated. Quartz lacks cleavage and shows irregular fracture; mica commonly has perfect basal cleavage.

Identified September 6, 2026More metamorphic →

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At a glance

Common name: Quartz-rich metamorphic rock, likely quartzite or quartz-veined schist
Scientific name: Quartz (SiO₂) with mica/chlorite-rich schistose matrix; possibly minor feldspar and sulfides
Category: metamorphic
Identified: September 6, 2026
Method: Standard

AI Estimated Value

About $5–$30 for an ordinary hand specimen; $30–$100+ if the quartz crystals are especially large, lustrous, or locality-documented.

Not an official valuation

AI estimate for general interest only — not an appraisal. Actual value depends on condition, provenance, and market demand. Verify with a professional before buying, selling, or insuring.

This identification was generated by AI and may contain errors. Verify important details before relying on them — and never use an AI result to judge whether a specimen is safe to handle. Read the full disclaimer

Physical properties

Formation & geological history

Formed when quartz-rich sediment or an older metamorphic rock was buried, heated, and deformed, with quartz recrystallizing into coarse veins or lenses. Precise age and locality cannot be determined from the photograph.

Uses & applications

Primarily a collecting specimen; quartzite can be used as crushed aggregate, building stone, and abrasive, while attractive quartz specimens may be decorative.

Geological facts

The contrasting white quartz and dark foliated host suggest hydrothermal quartz veining during metamorphism. Individual quartz grains commonly resist weathering better than the surrounding schist.

Field identification & locations

Look for abundant interlocking quartz, visible foliation, and flakes of mica that sparkle or peel; a streak and hardness test can distinguish quartz from calcite. Common in metamorphic belts worldwide.