sedimentary

Red Jasper (with Epidote/Chlorite inclusions)

Silicon Dioxide (SiO2) with Hematite and secondary silicates

AI-generated identification · may be incorrect

Hardness: 6.5 - 7.0 on the Mohs scale; Color: Brick-red to deep maroon with mottled dark green and greyish-white inclusions; Luster: Vitreous to waxy (high polish); Crystal System: Trigonal (microcrystalline/cryptocrystalline); Cleavage: None (conchoidal fracture); Specific Gravity: 2.58 - 2.91.

Hardness: 6
Luster: Vitreous to waxy (high polish)

Identified October 3, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed through the precipitation of silica from low-temperature hydrothermal fluids or groundwater percolating through sediments, microfractures, or volcanic ash beds. The red coloration is caused by finely disseminated hematite (iron oxide), while the green patches typically consist of chlorite or epidote minerals.

Uses & applications

Commonly shaped into cabochons, beads, decorative eggs, spheres, and tumbled stones. Widely used in lapidary arts, ornamental carvings, and metaphysical/crystal collections.

Geological facts

Jasper has been utilized since antiquity, revered by ancient civilizations including Egyptians, Greeks, and Romans as a protective talisman and carving stone. Polished mineral eggs, like this specimen, became especially popular as symbols of rebirth and renewal.

Field identification & locations

Identifiable in the field by its distinct opaque brick-red color, extreme hardness (scratches steel and glass), absence of cleavage, and smooth conchoidal fracture when broken. Major localities include South Africa, India, Brazil, Madagascar, and the western United States.