metamorphic

Weathered quartz-rich rock, possibly quartzite or quartz vein material

Quartz-dominant aggregate; chiefly SiO₂, with likely iron-oxide staining and minor feldspar or mica

AI-generated identification · may be incorrect

Hardness about 7; pale gray to tan with rusty brown patches, dull to waxy luster, and granular interlocking texture. No clear cleavage is visible; individual quartz grains or vein fragments appear cemented/intergrown.

Identified September 20, 2026More metamorphic →

Explore Weathered quartz-rich rock, possibly quartzite or quartz vein material in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

At a glance

Common name: Weathered quartz-rich rock, possibly quartzite or quartz vein material
Scientific name: Quartz-dominant aggregate; chiefly SiO₂, with likely iron-oxide staining and minor feldspar or mica
Category: metamorphic
Identified: September 20, 2026
Method: Standard

AI Estimated Value

Typically $1–$10 as an ordinary specimen; roughly $10–$30 if unusually attractive, polished, or locality-labeled.

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 metamorphism or silicification of a quartz-rich protolith, with later surface weathering and iron staining. Precise age and origin cannot be determined from the photograph alone.

Uses & applications

Usually a common field specimen with little commercial value; quartzite may be used as aggregate, decorative stone, or building material. Attractive pieces can be collected or polished.

Geological facts

The rounded shape may result from stream transport or prolonged weathering. Rust-colored areas commonly reflect oxidation of iron-bearing minerals rather than the primary rock color.

Field identification & locations

Test hardness against glass: quartz-rich material should scratch it; inspect a fresh broken surface for glassy quartz grains. Common in metamorphic terrains, quartz veins, gravel deposits, and weathered outcrops.