metamorphic

Iron-stained metamorphic rock, likely quartzite or jasper

Quartz-rich rock dominated by SiO₂, with iron oxides/hydroxides (hematite, goethite) and possible clay or mica

AI-generated identification · may be incorrect

Hardness likely 6–7 Mohs; mottled red, brown, yellow, gray, and cream coloration; earthy to slightly vitreous luster; massive, fine-grained texture with no obvious cleavage. The red-yellow colors are typical of iron staining, but the photograph cannot confirm the exact mineralogy.

Identified September 13, 2026More metamorphic →

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At a glance

Common name: Iron-stained metamorphic rock, likely quartzite or jasper
Scientific name: Quartz-rich rock dominated by SiO₂, with iron oxides/hydroxides (hematite, goethite) and possible clay or mica
Category: metamorphic
Identified: September 13, 2026
Method: Standard

AI Estimated Value

$1–$15 commonly; up to about $20–$50 for attractive polished or locality-documented material

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

Probably formed by metamorphism or silicification of a quartz-rich sediment, followed by weathering and oxidation of iron-bearing minerals. Its precise geological age and locality cannot be determined from the image.

Uses & applications

May be used as a decorative or lapidary stone if it takes a polish; otherwise it is mainly a field or teaching specimen. It has little industrial value as an unverified hand sample.

Geological facts

The rusty colors commonly result from hematite and goethite coatings or cement. A white streak, hardness testing, acid testing, and a fresh broken surface would help distinguish quartzite from jasper, ironstone, or altered volcanic rock.

Field identification & locations

Likely found in weathered quartz-rich metamorphic or sedimentary terrains worldwide; quartz grains should scratch glass, while a steel nail generally will not scratch it. Collector value is typically $1–$15 for a hand-sized ordinary specimen, potentially $20–$50 if it polishes attractively.