sedimentary

Likely weathered sandstone or iron-stained quartz fragment

Quartz-rich sandstone; predominantly SiO₂ with iron-oxide staining

AI-generated identification · may be incorrect

Small tan-brown, dull to slightly earthy fragment with visible layered/granular texture and dark iron staining. Quartz has Mohs hardness 7; sandstone is variable and commonly scratches glass only where quartz grains are exposed; cleavage absent and specific gravity about 2.2–2.7.

Identified September 12, 2026More sedimentary →

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At a glance

Common name: Likely weathered sandstone or iron-stained quartz fragment
Scientific name: Quartz-rich sandstone; predominantly SiO₂ with iron-oxide staining
Category: sedimentary
Identified: September 12, 2026
Method: Standard

AI Estimated Value

Typically $0–$5 as an unproven small fragment; higher value requires documented locality, unusual texture, or a distinctive mineral association.

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 cemented quartz sand, then weathered and broken from a larger sedimentary rock. The image cannot establish its geological age; sandstone ranges from Precambrian to Recent.

Uses & applications

Common sandstone is used as building stone, paving, aggregate, and abrasives; this tiny fragment has mainly educational or collecting value.

Geological facts

The brown coloration commonly comes from hematite or limonite coatings between quartz grains. Its apparent layering may reflect bedding or weathering along cemented layers.

Field identification & locations

Look for discrete sand grains, uneven grain boundaries, and rusty brown staining; dilute acid should produce little or no reaction unless carbonate cement is present. Common worldwide in sedimentary basins.