sedimentary

Red Jasper with Chalcedony Banding

Microcrystalline Quartz (SiO2) with Hematite inclusions

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs scale); Color: Red, brown, and white; Luster: Dull/waxy (unpolished) to Vitreous (polished); Structure: Microcrystalline; Cleavage: None/Conchoidal fracture.

Hardness: 6
Color: Red, brown, and white
Luster: Dull/waxy (unpolished) to Vitreous (polished)

Identified July 17, 2026More sedimentary →

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Physical properties

Hardness: 6.5-7 (Mohs scale); Color: Red, brown, and white; Luster: Dull/waxy (unpolished) to Vitreous (polished); Structure: Microcrystalline; Cleavage: None/Conchoidal fracture.

Formation & geological history

Formed when silica-rich fluids permeate through volcanic ash or sedimentary rocks, precipitating microcrystalline quartz. The red color is caused by iron (hematite) inclusions.

Uses & applications

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

Geological facts

Jasper is often found in association with agate (the translucent bands). It has been used since antiquity for seals, ornaments, and ritual tools.

Field identification & locations

Identify by its opacity, conchoidal fracture, and ability to scratch glass. Commonly found in riverbeds, desert regions, and worldwide volcanic deposits.