sedimentary

Quartz-veined ironstone/jasper

Silicified ferruginous rock; predominantly microcrystalline quartz (SiO₂) with iron oxides/hydroxides, likely goethite and hematite

AI-generated identification · may be incorrect

Hardness roughly 6–7, rusty orange-brown color, earthy to dull luster, opaque matrix with a white-to-translucent quartz/chalcedony vein and drusy crystals; massive, without obvious cleavage. Exact identification is limited without testing.

Identified September 20, 2026More sedimentary →

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At a glance

Common name: Quartz-veined ironstone/jasper
Scientific name: Silicified ferruginous rock; predominantly microcrystalline quartz (SiO₂) with iron oxides/hydroxides, likely goethite and hematite
Category: sedimentary
Identified: September 20, 2026
Method: Standard

AI Estimated Value

Approximately $5–$25 for a common hand specimen; $30–$100+ if unusually attractive, large, or polished.

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 when silica-rich fluids filled fractures in iron-rich sediment or weathered rock, with later oxidation producing the brown-orange iron staining. The geological age cannot be determined from the photograph; similar material occurs in many ancient iron-formations and weathering zones.

Uses & applications

Used mainly as a lapidary, display, or teaching specimen; attractive pieces may be cut or polished. It has little structural or industrial value compared with ordinary ironstone or quartz.

Geological facts

The contrasting white quartz vein and iron-oxide matrix are characteristic of silicification and oxidation. Acid fizz, streak, hardness, and specific-gravity tests would help distinguish jasper, quartz, and ironstone components.

Field identification & locations

Commonly found in iron-rich soils, volcanic or sedimentary terrains, and hydrothermal vein zones worldwide. Look for a red-brown streak or powder, quartz that scratches glass, and possible drusy crystal sparkle.