sedimentary

Red Jasper

Silicon dioxide (SiO2) with iron oxide inclusions

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs); Color: Red, brown, or earthy orange; Luster: Vitreous to waxy; Structure: Microcrystalline (Cryptocrystalline) quartz; Cleavage: None/Conchoidal fracture; Gravity: 2.58-2.91

Hardness: 6
Color: Red, brown, or earthy orange
Luster: Vitreous to waxy

Identified July 11, 2026More sedimentary →

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Physical properties

Hardness: 6.5-7 (Mohs); Color: Red, brown, or earthy orange; Luster: Vitreous to waxy; Structure: Microcrystalline (Cryptocrystalline) quartz; Cleavage: None/Conchoidal fracture; Gravity: 2.58-2.91

Formation & geological history

Forms through the deposition of silica from hydrothermal fluids or volcanic ash within sedimentary environments. The red color is caused by trace iron (hematite) inclusions during the solidification process.

Uses & applications

Used primarily in lapidary arts for jewelry, cabochons, and decorative carvings; historically used for seal stones and ritual tools.

Geological facts

In antiquity, jasper was considered a stone of protection and was mentioned in various religious texts. It is an opaque variety of chalcedony.

Field identification & locations

Identify by its rich red color, opacity (light does not pass through even thin edges), and smooth, glass-like fracture surfaces. Often found in riverbeds, glacial deposits, or near volcanic regions.