metamorphic

Weathered quartz-rich rock, possibly milky quartz or quartzite

Quartz (SiO₂), possibly quartzite with iron-oxide and dark-mineral inclusions

AI-generated identification · may be incorrect

Typically Mohs hardness 7, white to cream, vitreous to dull from weathering, with irregular fracture and no visible cleavage; specific gravity about 2.65. The specimen appears porous and heavily weathered, with dark patches and rusty staining.

Identified August 15, 2026More metamorphic →

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At a glance

Common name: Weathered quartz-rich rock, possibly milky quartz or quartzite
Scientific name: Quartz (SiO₂), possibly quartzite with iron-oxide and dark-mineral inclusions
Category: metamorphic
Identified: August 15, 2026
Method: Standard

AI Estimated Value

About $1–$10 as an ordinary weathered specimen; potentially $10–$30 if confirmed as an unusual, attractive mineral specimen.

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

Quartzite forms when quartz sandstone is recrystallized during metamorphism; milky quartz forms from silica-rich hydrothermal fluids filling fractures. An exact geological age and origin cannot be determined from the photograph.

Uses & applications

Common quartzite is used for aggregate, paving, building stone, and sometimes decorative pieces; attractive quartz specimens are collected but this example appears low-grade.

Geological facts

Dark spots may be iron-manganese oxides, mica, or other inclusions rather than metallic material. A steel file should not easily scratch fresh quartz surfaces.

Field identification & locations

Common in metamorphic terrains, stream gravels, and hydrothermal veins worldwide; test hardness, inspect a freshly broken surface, and use a hand lens to distinguish quartz grains from other minerals.