sedimentary

Red Jasper

Silicon dioxide (SiO2) with iron oxide inclusions

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs); Color: Deep red, maroon, or brownish-red; Luster: Dull to waxy when raw; Crystal Structure: Microcrystalline/Cryptocrystalline (Hexagonal); Cleavage: None; Opaque.

Hardness: 6
Color: Deep red, maroon, or brownish-red
Luster: Dull to waxy when raw

Identified July 21, 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

Hardness: 6.5-7 (Mohs); Color: Deep red, maroon, or brownish-red; Luster: Dull to waxy when raw; Crystal Structure: Microcrystalline/Cryptocrystalline (Hexagonal); Cleavage: None; Opaque.

Formation & geological history

Formed through the accumulation of fine silica and volcanic ash or clay, colored by hematite (iron) inclusions. Most jasper deposits date back to the Precambrian or Paleozoic eras.

Uses & applications

Used primarily for lapidary work, jewelry (cabochons, beads), decorative ornaments, and widely collected as pocket stones or metaphysical tools.

Geological facts

The name Jasper comes from the Greek word 'iaspis', meaning spotted stone. It has been used since antiquity for royal seals and amulets. It is often referred to as the 'Supreme Nurturer' in gemstone folklore.

Field identification & locations

Identify by its rich red color, opacity (it will not let light through even at the edges), and smooth, dull texture that can take a high polish. Commonly found in riverbeds or coastal areas in India, Brazil, and the Southwestern United States.