sedimentary or metamorphic

Red Jasper (possibly with Quartz or Hematite)

Silicon Dioxide (SiO2) with iron oxide impurities

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs), Color: Opaque brick red to maroon, Luster: Vitreous to dull, Crystal Structure: Trigonal (microcrystalline), Fracture: Conchoidal, Specific Gravity: 2.58-2.91

Hardness: 6

Identified June 21, 2026More sedimentary or metamorphic →

Explore Red Jasper (possibly with Quartz or Hematite) 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: Opaque brick red to maroon, Luster: Vitreous to dull, Crystal Structure: Trigonal (microcrystalline), Fracture: Conchoidal, Specific Gravity: 2.58-2.91

Formation & geological history

Formed through the accumulation of fine-grained silica in sedimentary environments or as secondary fluids filling fractures in volcanic rock. The red color is caused by iron (hematite) inclusions within the cryptocrystalline quartz.

Uses & applications

Primarily used for lapidary work, jewelry (cabochons), carvings, and as a popular specimen for crystal healing and decorative collections.

Geological facts

Jasper is a variety of chalcedony. Historically, it was known as the 'supreme nurturer' and has been used in seals and amulets since ancient Mesopotamian and Greek times.

Field identification & locations

Identify by its opacity (unlike translucent carnelian), smooth conchoidal fracture, and inability to be scratched by a steel knife. Commonly found in riverbeds and desert environments in the western USA, India, Russia, and Brazil.