sedimentary
Red Jasper
Microcrystalline Quartz (SiO2)
Hardness of 6.5-7 on the Mohs scale, red to reddish-brown color due to iron inclusions, waxy to vitreous luster, trigonal crystal system, conchoidal fracture, and specific gravity around 2.65.
Identified More sedimentary →
Explore Red Jasper in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness of 6.5-7 on the Mohs scale, red to reddish-brown color due to iron inclusions, waxy to vitreous luster, trigonal crystal system, conchoidal fracture, and specific gravity around 2.65.
Formation & geological history
Formed through the accumulation of silica-rich sediments and radiolarian oozes on ocean floors, often precipitated from silica-rich hydrothermal solutions or volcanic activity, subsequently lithified over millions of years.
Uses & applications
Commonly used for tumbled stones, cabochons, carved ornaments, decorative objects, and lapidary art.
Geological facts
Jasper has been used since ancient times for talismans, seals, and jewelry. The name means 'spotted or speckled stone' and it is mentioned in various historical and religious texts.
Field identification & locations
Easily identified by its opaque red appearance, hardness that scratches glass, and smooth conchoidal fracture. Found worldwide, particularly in India, Russia, Brazil, France, Germany, and the USA.
More like this
Other sedimentary specimens
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Generic Pebble / Rock Fragment
Lithic fragment / Weathered rock
sedimentary
Sedimentary Sandstone
Arenite (Sedimentary Rock)
sedimentary
Fossiliferous Concretion
Septarian Concretion containing Brachiopods/Crinoids
fossil
Banded Siltstone / Mudstone Pebble
Siltstone / Argillite
sedimentary