mineral

Weathered quartz-rich rock, possibly milky quartz or quartz-bearing granite

Quartz (SiO₂), potentially with feldspar and iron-oxide staining

AI-generated identification · may be incorrect

Cream-white, opaque to translucent, with a dull to glassy luster and irregular fracture; quartz hardness is about 7 Mohs, with no cleavage. The image is insufficient to confirm crystal structure or specific gravity.

Identified August 11, 2026More mineral →

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At a glance

Common name: Weathered quartz-rich rock, possibly milky quartz or quartz-bearing granite
Scientific name: Quartz (SiO₂), potentially with feldspar and iron-oxide staining
Category: mineral
Identified: August 11, 2026
Method: Standard

AI Estimated Value

About $1-$10 as an unremarkable hand specimen; more if crystal faces, unusual inclusions, or verified provenance are present.

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

Likely formed by cooling of silica-rich magma or precipitation from hydrothermal fluids; its exact geological age and setting cannot be determined visually. Brown areas may be weathered iron oxides or attached host material.

Uses & applications

Common quartz is used in glass, ceramics, abrasives, electronics, and decorative stone; attractive pieces may be collected, but this specimen appears low-grade for jewelry.

Geological facts

Quartz commonly forms six-sided crystals, but massive quartz lacks obvious crystal faces. A steel knife should not scratch quartz, while quartz can scratch ordinary glass.

Field identification & locations

Look for glassy translucence, conchoidal fracture, and hardness; test on an inconspicuous area and avoid confusing it with calcite, which is softer and fizzes in dilute acid. Quartz-rich material occurs worldwide in veins, pegmatites, and igneous rocks.