Red Jasper

Physical Properties

Hardness: 6.5-7 (Mohs), Color: Red to brownish-red, Luster: Vitreous to waxy, Crystal Structure: Trigonal (microcrystalline quartz), Cleavage: None (conchoidal fracture), Specific Gravity: 2.58–2.91

Formation & Geological History

Formed from the deposition of silica-rich fluids in volcanic or sedimentary environments. Its red color is derived from high iron content (hematite inclusions), often dating back to various geological eras from the Precambrian to more recent times.

Uses & Applications

Predominantly used for jewelry, lapidary arts, decorative items, and pocket stones for collectors. Historically used for making seal stones and amulets.

Geological Facts

Jasper is an opaque variety of chalcedony. It has been a popular gemstone for millennia and was mentioned in the Bible as the 'mother of all stones'. The name comes from the Greek word 'iaspis', meaning spotted stone.

Field Identification & Locations

Identify by its rich red color, opacity (light does not pass through), and smooth, glassy feel when polished. Commonly found in riverbeds or near volcanic sites in regions like India, Russia, Brazil, and the Southwestern USA.

Identified on: 5/20/2026

Mode: Standard