sedimentary

Red Jasper

Silicon Dioxide (SiO2)

Hardness: 6.5-7 Mohs; Color: Brick red to brownish-red; Luster: Vitreous to dull; Crystal structure: Trigonal (microcrystalline); Cleavage: None; Fracture: Conchoidal; Specific Gravity: 2.58-2.91

Hardness: 6
Color: Brick red to brownish-red
Luster: Vitreous to dull

Identified July 17, 2026More sedimentary →

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Physical properties

Hardness: 6.5-7 Mohs; Color: Brick red to brownish-red; Luster: Vitreous to dull; Crystal structure: Trigonal (microcrystalline); Cleavage: None; Fracture: Conchoidal; Specific Gravity: 2.58-2.91

Formation & geological history

Formed when fine silica-rich materials were deposited in sediments or volcanic ash, with iron inclusions providing the red color. Typically occurs in hydrothermal veins or as nodules in sedimentary rocks.

Uses & applications

Used extensively for lapidary work, jewelry (cabochons and beads), ornamental carvings, and as a popular stone for crystal healing and collecting.

Geological facts

Red Jasper is an opaque variety of chalcedony. It has been used since antiquity for seals and amulets, and was known in many cultures as a stone of endurance and protection.

Field identification & locations

Identifiable by its deep red color, smooth waxy texture when broken, and inability to be scratched by a steel pocketknife. Common in riverbeds and desert environments globally.