mineral

Red Jasper

Silicon dioxide (SiO2) with iron oxide inclusions

Hardness: 6.5-7 (Mohs scale), Color: Brick red to brownish-red, Luster: Vitreous to waxy, Crystal Structure: Trigonal (microcrystalline), Cleavage: None (conchoidal fracture), Specific Gravity: 2.58-2.91

Hardness: 6

Identified May 5, 2026More mineral →

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Physical properties

Formation & geological history

Formed as a result of silica-rich fluids permeating through volcanic or sedimentary rock, often with iron oxide providing the red pigmentation. It is found in ancient geological formations across all periods.

Uses & applications

Used primarily in lapidary arts for cabochons, beads, and carvings. Historically used for seals and talismans. Occasionally used as decorative inlay.

Geological facts

The word 'Jasper' is derived from Gk. iaspis, meaning 'spotted stone.' It was one of the stones in the breastplate of the Jewish high priest.

Field identification & locations

Identify in the field by its opaque red color and high hardness (it will scratch glass). Commonly found in river beds, beaches, and desert plains globally, notably in the USA, India, and Brazil.

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