sedimentary

Red Jasper

Jasper (Silicon Dioxide, SiO2)

Hardness: 6.5-7 (Mohs scale); Color: Brick red to brownish-red; Luster: Vitreous to dull; Crystal structure: Hexagonal (trigonal) microcrystalline; Cleavage: None; Specific gravity: 2.58-2.91

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

Identified April 15, 2026More sedimentary →

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Physical properties

Hardness: 6.5-7 (Mohs scale); Color: Brick red to brownish-red; Luster: Vitreous to dull; Crystal structure: Hexagonal (trigonal) microcrystalline; Cleavage: None; Specific gravity: 2.58-2.91

Formation & geological history

Formed through the deposition of silica from water-saturated solutions, often near volcanic vents or in sedimentary beds. The red color comes from iron (hematite) inclusions incorporated during formation millions of years ago.

Uses & applications

Commonly used in lapidary work for cabochons, beads, and tumbled stones. Historically used for seals, vases, and ornamentation. Today, it is popular in jewelry and as a meditation/metaphysical stone.

Geological facts

Red Jasper has been used since antiquity; it was known in ancient Egypt as the 'blood of Isis' and was used in Greek, Roman, and Persian cultures for protective amulets.

Field identification & locations

Identify in the field by its opaque, deep red color, conchoidal fracture, and extreme hardness (it will scratch glass). Commonly found in river beds or desert pavements in areas like the southwestern USA, South Africa, and Brazil.