mineral

Red Jasper

Silicon Dioxide (SiO2) with Iron inclusions

Hardness: 6.5 - 7 on Mohs scale; Color: Brick-red to brownish-red; Luster: Dull to greasy (unless polished); Crystal Structure: Microcrystalline/Cryptocrystalline (Trigonal); Cleavage: None; Relief: Conchoidal fracture.

Hardness: 6
Color: Brick-red to brownish-red
Luster: Dull to greasy (unless polished)

Identified March 19, 2026More mineral →

Identify your own rocks.

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

App Store Google Play

Physical properties

Formation & geological history

Formed from the deposition of silica in fissure veins, volcanic cavities, or within sedimentary rocks during the chemical precipitation of silica-rich fluids. Its red color originates from iron oxide (hematite) impurities integrated during formation.

Uses & applications

Used widely in lapidary arts for cabochons, beads, and carvings. Historically used for seals and amulets. It is a popular ornamental stone for home decor and jewelry.

Geological facts

In medieval times, it was known as the 'warrior's stone' and was etched onto sword hilts to protect the wearer. It is a variety of chalcedony and is often found as smooth river stones due to its high durability against erosion.

Field identification & locations

Identify in the field by its opaque deep red color, lack of transparency (unlike carnelian), and smooth conchoidal fracture. It is commonly found in India, Russia, Brazil, and the Southwestern United States. It's easy for collectors to find in riverbeds or gravel pits.

Other mineral specimens

See all

Sandstone (with potential mineral staining/concretions)

Arenite (SiO2 based)

sedimentary

Epidote

Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)

metamorphic

Nephrite Jade

Nephrite

Mineral/Rock

Banded Gneiss (River Rock/Pebble)

Gneiss (specifically a banded variety often found as a river rock)

Metamorphic Rock

Green Apatite on Albite

Fluorapatite [Ca5(PO4)3F] on Albite [Na(AlSi3O8)]

mineral

Epidote

Epidote - Ca2(Al2,Fe3+)3(SiO4)3(OH)

mineral