sedimentary

Red Jasper

Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)

AI-generated identification · may be incorrect

Hardness: 6.5-7 on Mohs scale; Color: Deep 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
Color: Deep Brick Red to Brownish-Red
Luster: Vitreous to Waxy

Identified June 17, 2026More sedimentary →

Explore Red Jasper in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Formed through the deposition of silica from hydrothermal solutions or volcanic ash, with oxygenation of iron inclusions creating the red color. Often found in Banded Iron Formations or as nodules in volcanic rocks.

Uses & applications

Used primarily for semi-precious jewelry (beads, cabochons), ornamental carvings, paperweights, and as a popular stone for lapidary tumbling and metaphysical collections.

Geological facts

Jasper has been a favorite gemstone since antiquity; it is mentioned in the Bible and was used by ancient Minoans and Egyptians for seals and talismans. Its name is derived from the Greek 'iaspis', meaning spotted stone.

Field identification & locations

Identify by its opaque nature (it does not let light through even at the edges), smooth texture when polished, and characteristic dull red streak. Common in riverbeds and desert environments globally, notably in India, Brazil, and the USA.