sedimentary

Banded sandstone (likely quartzitic sandstone)

Quartz-rich sandstone; predominantly quartz (SiO₂) with iron-oxide cement and minor feldspar/clay

AI-generated identification · may be incorrect

Typically Mohs 6–7 for quartz grains, with a gritty texture, dull to slightly glassy luster, cream, pink, gray, and rusty-red banding, and no cleavage. The visible curved layers reflect sedimentary bedding or subsequent deformation/weathering.

Identified August 18, 2026More sedimentary →

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At a glance

Common name: Banded sandstone (likely quartzitic sandstone)
Scientific name: Quartz-rich sandstone; predominantly quartz (SiO₂) with iron-oxide cement and minor feldspar/clay
Category: sedimentary
Identified: August 18, 2026
Method: Standard

AI Estimated Value

About $5–$30 for a common hand specimen; occasionally $30–$100 if unusually patterned, polished, or locality-documented.

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

Formed from compacted and cemented sand in ancient rivers, beaches, dunes, or shallow seas; iron oxides produce the red-orange colors. Exact age and locality cannot be determined from the photograph.

Uses & applications

Used as building stone, paving, aggregate, and decorative material; attractive pieces are collected but are generally not gemstone-grade.

Geological facts

The specimen appears naturally rounded, likely by stream or wave abrasion. Its parallel bands may be cross-bedding, color-banded cement, or mild deformation rather than crystal layering.

Field identification & locations

Identify it by its gritty granular surface, visible sand-sized grains, and resistance to scratching; quartz-rich varieties can scratch glass. Common worldwide, especially in sedimentary basins and river gravels.