metamorphic

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

Quartz (SiO₂), likely with iron-oxide inclusions; exact identification requires testing

AI-generated identification · may be incorrect

Pale yellow to tan, translucent patches, vitreous-to-waxy luster, irregular fracture, and no obvious cleavage; quartz hardness is Mohs 7, though the specimen may contain softer minerals and weathered surfaces. Specific gravity is roughly 2.6–2.7.

Identified September 16, 2026More metamorphic →

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At a glance

Common name: Quartz-rich rock, possibly iron-stained quartz or quartzite
Scientific name: Quartz (SiO₂), likely with iron-oxide inclusions; exact identification requires testing
Category: metamorphic
Identified: September 16, 2026
Method: Standard

AI Estimated Value

Approximately $1–$10 as a common hand specimen; higher only if testing reveals attractive crystals or unusual inclusions.

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 from silica-rich veins or sandstone recrystallized during metamorphism, with yellow-brown coloration caused by iron oxides or hydroxides. Its geological age cannot be determined from the image.

Uses & applications

Common quartzite is used as aggregate, paving stone, and decorative rock; attractive translucent pieces may be collected or cut as ornamental material, but this specimen appears modest in gem value.

Geological facts

The rounded, rough texture and mixed translucency are consistent with quartz-bearing material rather than a single clear crystal. A scratch test, streak test, and close examination for granular texture would improve identification.

Field identification & locations

Look for glassy fracture, resistance to scratching with a steel tool, and lack of reaction to dilute hydrochloric acid; iron staining commonly occurs in quartz veins and weathered quartzite. Common worldwide, especially in hydrothermal veins and metamorphic terrains.