sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

AI-generated identification · may be incorrect

Hardness (Mohs): 6.5-7; Color: Rusty red, brownish-red; Luster: Dull to vitreous; Crystal Structure: Microcrystalline/Trigonal; Cleavage: None; Specific Gravity: 2.58-2.91

Color: Rusty red, brownish-red
Luster: Dull to vitreous

Identified May 28, 2026More sedimentary →

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Physical properties

Hardness (Mohs): 6.5-7; Color: Rusty red, brownish-red; Luster: Dull to vitreous; Crystal Structure: Microcrystalline/Trigonal; Cleavage: None; Specific Gravity: 2.58-2.91

Formation & geological history

Formed through the infiltration of silica-rich fluids into sediment or volcanic ash, followed by silicification. Often found in proximity to ancient hydrothermal vents or in sedimentary beds where iron oxidation (hematite) provides the red pigment.

Uses & applications

Used widely in lapidary arts for making cabochons, beads, and ornamental carvings. It is also a popular collector's stone and used in landscaping.

Geological facts

Jasper is an opaque variety of chalcedony. The red variety has historically been known as a 'warrior stone,' believed to provide strength and courage. Many famous ancient seals and amulets were carved from red jasper.

Field identification & locations

Identify by its solid red color, high hardness (will scratch glass), and smooth, conchoidal fracture when broken. Found commonly in riverbeds and arid regions globally, notably in India, Brazil, and the Southwestern USA.