metamorphic

Iron-stained quartz-rich rock, possibly quartzite or chalcedony

Quartz (SiO₂), likely in a quartzite/chalcedonic matrix with iron oxides

AI-generated identification · may be incorrect

Tan to rusty orange, white translucent areas, and a sugary-to-waxy luster; visible granular quartz fragments and brown iron-oxide staining. Quartz hardness is Mohs 7, with no cleavage; exact texture and density are obscured by the small, weathered specimen.

Identified September 5, 2026More metamorphic →

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At a glance

Common name: Iron-stained quartz-rich rock, possibly quartzite or chalcedony
Scientific name: Quartz (SiO₂), likely in a quartzite/chalcedonic matrix with iron oxides
Category: metamorphic
Identified: September 5, 2026
Method: Standard

AI Estimated Value

About $1–$10 for a common hand specimen; potentially $10–$30 if it polishes attractively. Identification confidence: moderate-low without a fresh surface or tests.

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

Most consistent with silica-rich material altered or cemented by iron oxides; if quartzite, it formed by metamorphism of sandstone, while chalcedony forms from silica-rich fluids. Age cannot be determined from the photograph.

Uses & applications

Usually a low-value curiosity or lapidary rough; suitable pieces may be cut, polished, or used in small decorative objects. Not generally used commercially at this size.

Geological facts

The rusty coloration is typically caused by hematite, goethite, or limonite rather than red quartz. The image does not show diagnostic crystal faces, so a precise identification requires testing.

Field identification & locations

Commonly plausible near Washington’s coastal Olympic Peninsula, where quartz-rich and iron-stained beach or glacial gravels occur. Test for glass-scratching ability, inspect a fresh broken surface, and check streak; acid testing is usually non-diagnostic unless carbonate material is suspected.