metamorphic

Weathered quartz-rich rock, possibly quartzite or iron-stained quartz

Quartz (SiO₂), likely in a quartzite matrix with iron-oxide staining

AI-generated identification · may be incorrect

Off-white to pale yellow-orange, granular and irregular, with a dull to weakly glassy luster; quartz hardness is about 7 Mohs, lacks cleavage, and has specific gravity near 2.65. The image is too limited for confident identification of texture or crystal structure.

Identified September 20, 2026More metamorphic →

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At a glance

Common name: Weathered quartz-rich rock, possibly quartzite or iron-stained quartz
Scientific name: Quartz (SiO₂), likely in a quartzite matrix with iron-oxide staining
Category: metamorphic
Identified: September 20, 2026
Method: Standard

AI Estimated Value

Typically $1–$10 as an ordinary specimen; possibly $10–$30 if unusually attractive or confirmed as a distinctive 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

If quartzite, it formed when quartz-rich sandstone was metamorphosed and recrystallized, typically during regional mountain-building; iron oxides produced the orange staining through weathering. A precise geological age cannot be determined from the photograph.

Uses & applications

Common quartzite is used as aggregate, building stone, road material, and sometimes decorative stone; attractive quartz specimens may be collected but this piece appears low-grade.

Geological facts

Quartzite commonly breaks across quartz grains rather than around them, producing a sugary or splintery fracture. Orange coloration commonly comes from hematite or limonite coatings and staining.

Field identification & locations

Look for a very hard, quartz-rich surface that scratches glass and does not react with dilute hydrochloric acid; a steel nail should not scratch it. Common worldwide, especially in metamorphic belts and exposed sandstone formations.