sedimentary

Weathered reddish sandstone or quartzite pebble

Iron-oxide-stained quartz-rich sandstone; possibly weakly metamorphosed quartzite

AI-generated identification · may be incorrect

Hardness is approximately 6–7, with a reddish-brown color, dull to slightly sugary luster, and fine granular texture. Quartz grains and iron-oxide cement are visible; no obvious cleavage, and pores or pits suggest sandstone rather than dense quartzite.

Identified September 3, 2026More sedimentary →

Explore Weathered reddish sandstone or quartzite pebble in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

At a glance

Common name: Weathered reddish sandstone or quartzite pebble
Scientific name: Iron-oxide-stained quartz-rich sandstone; possibly weakly metamorphosed quartzite
Category: sedimentary
Identified: September 3, 2026
Method: Standard

AI Estimated Value

Typically $1–$10 as a common specimen; up to about $20–$50 if unusually attractive, locality-labeled, or naturally patterned.

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 compacted, silica-rich sand later stained by hematite or limonite, then rounded by weathering and transport; if quartzite, it underwent low-grade metamorphism. Its exact geological age cannot be determined from the image and may range from ancient to relatively young sedimentary deposits.

Uses & applications

Usually collected as a natural pebble or used decoratively; sandstone can be used as building or paving stone, while quartzite is valued for durable aggregate, countertops, and construction.

Geological facts

The red color commonly results from microscopic iron oxides coating quartz grains. Rounded edges and surface pits indicate prolonged abrasion and chemical weathering.

Field identification & locations

Look for sand-sized quartz grains, gritty fracture, reddish iron staining, and low density of dark minerals; a glassy fracture and very high toughness would favor quartzite. Common in river gravels, beaches, deserts, and eroded sandstone terrains.