sedimentary

Red Jasper with Hematite

Impure Microcrystalline Quartz (SiO2) with Hematite (Fe2O3)

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs scale); Color: Red, brown, and black; Luster: Dull to waxy; Structure: Microcrystalline; Cleavage: None; Specific Gravity: 2.58-2.91

Hardness: 6
Color: Red, brown, and black
Luster: Dull to waxy

Identified July 19, 2026More sedimentary →

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Physical properties

Hardness: 6.5-7 (Mohs scale); Color: Red, brown, and black; Luster: Dull to waxy; Structure: Microcrystalline; Cleavage: None; Specific Gravity: 2.58-2.91

Formation & geological history

Formed through the accumulation of silica-rich micro-sediments or from volcanic ash deposition. The red color is caused by iron oxidation, while black areas are concentrated hematite inclusions.

Uses & applications

Commonly used for lapidary work including cabochons, beads, decorative carvings, and as a pocket stone for collectors.

Geological facts

Jasper is known as the 'supreme nurturer.' The red variety gets its hue specifically from high iron content. It has been used for seals and amulets since ancient times.

Field identification & locations

Identified by its opacity, characteristic red and black banding or mottling, and its ability to scratch glass. Found frequently in riverbeds or gravel pits in the Lake Superior region and Southwestern US.