mineral

Red jasper in gray host rock (likely hematite-stained quartzite or rhyolite)

Jasper: microcrystalline quartz (SiO₂), with iron-oxide coloration; exact host uncertain from image

AI-generated identification · may be incorrect

Opaque gray, fine-grained, dull to slightly waxy luster, with irregular brick-red patches likely hematite or red jasper; quartz hardness about 7 Mohs, with no obvious cleavage. Specific gravity is typically about 2.6–2.7.

Identified August 8, 2026More mineral →

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At a glance

Common name: Red jasper in gray host rock (likely hematite-stained quartzite or rhyolite)
Scientific name: Jasper: microcrystalline quartz (SiO₂), with iron-oxide coloration; exact host uncertain from image
Category: mineral
Identified: August 8, 2026
Method: Standard

AI Estimated Value

About $5–$30 for a common rough specimen; $30–$100+ if confirmed as attractive lapidary-grade jasper from a notable locality.

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

Forms when silica-rich fluids replace or cement sediments or volcanic rock, while iron oxides create red coloration; the specimen’s exact geological age and host-rock origin cannot be determined visually.

Uses & applications

Used as lapidary material, cabochons, carvings, tumbled stones, and decorative stone; the rough piece has modest collecting value unless from a distinctive locality.

Geological facts

The red areas may be jasper, hematite, or iron-rich alteration rather than a separate mineral layer. A streak test and hardness testing can distinguish iron oxide from silica-rich jasper.

Field identification & locations

Likely found in iron-rich silica veins, altered volcanic rocks, or sedimentary jasper deposits worldwide. Test an inconspicuous area: quartz-rich material scratches glass, whereas hematite gives a reddish-brown streak and is softer.