metamorphic

Quartz-rich metamorphic rock, likely quartzite

Quartzite; predominantly crystalline SiO₂ with minor iron-oxide staining and possible feldspar/mica

AI-generated identification · may be incorrect

Typically Mohs hardness ~7, white to gray with rusty orange-brown hematite/limonite staining; vitreous to sugary luster, interlocking quartz grains, and no prominent cleavage. The specimen appears massive and weathered, though a photograph cannot confirm texture or composition definitively.

Identified September 5, 2026More metamorphic →

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At a glance

Common name: Quartz-rich metamorphic rock, likely quartzite
Scientific name: Quartzite; predominantly crystalline SiO₂ with minor iron-oxide staining and possible feldspar/mica
Category: metamorphic
Identified: September 5, 2026
Method: Standard

AI Estimated Value

Approximately $5-$25 for a common hand specimen; $25-$100 if unusually attractive, polished, or sold as a distinctive landscape 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

Forms when quartz-rich sandstone is recrystallized under elevated heat and pressure during regional metamorphism, commonly during Precambrian to Paleozoic mountain-building events. It commonly occurs in resistant ridges and metamorphic belts.

Uses & applications

Used as crushed aggregate, dimension stone, landscaping rock, and occasionally as decorative or lapidary material. Attractive iron-stained pieces may be collected, but this specimen appears common rather than gem-grade.

Geological facts

Quartzite is harder and more resistant to weathering than its sandstone precursor. Orange coloration generally reflects oxidized iron minerals filling fractures or coating quartz grains.

Field identification & locations

Identify it by attempting to scratch glass, observing interlocking sugary quartz texture, and checking that grains do not crumble like sandstone; acid produces no reaction unless carbonate is present. Common in metamorphic mountain regions worldwide.