mineral

Iron-oxide-stained jasper or weathered ironstone

Microcrystalline quartz (SiO₂) with hematite/goethite and probable clay minerals

AI-generated identification · may be incorrect

Hardness approximately 6–7 Mohs for jasper, with earthy softer coatings; mottled rusty red, orange, yellow, brown, and green, generally dull to waxy luster, and no visible cleavage. The irregular texture and vivid iron staining suggest a silica-rich breccia or ironstone rather than a single crystal.

Identified August 26, 2026More mineral →

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Physical properties

Formation & geological history

Likely formed by silica replacement or cementation in a weathered, hydrothermal, or sedimentary environment, with later oxidation producing hematite and goethite colors; exact age and locality cannot be determined from the image.

Uses & applications

Used as a lapidary material, ornamental stone, and collector specimen; attractive pieces may be polished or cut into cabochons, but this rough specimen has limited commercial use.

Geological facts

Red-brown colors commonly come from hematite, while yellow-orange areas often reflect goethite or limonite; green patches may be chlorite, epidote, or altered clay minerals.

Field identification & locations

Identify it by its opaque appearance, rusty streak or staining, lack of cleavage, and resistance to scratching by a steel knife; quartz-rich areas should not scratch readily. Common in oxidized ore zones and iron-rich sedimentary terrains.