sedimentary

Red Jasper

Jasper (Silicon Dioxide with Iron Oxide inclusions), SiO2

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs scale); Color: Opaque brick red to brownish-red; Luster: Vitreous to dull; Crystal Structure: Hexagonal (cryptocrystalline); Cleavage: None (conchoidal fracture); Specific Gravity: 2.58-2.91

Hardness: 6
Color: Opaque brick red to brownish-red
Luster: Vitreous to dull

Identified February 5, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed through the deposition of silica from water or volcanic ash, occurring in sedimentary beds or as nodules in volcanic rocks. The red color comes from iron inclusions (hematite). Many specimens are millions of years old, dating back to various geological periods.

Uses & applications

Commonly used in jewelry (cabochons, beads), decorative carvings, and as a polished healing stone in metaphysical communities. Historically used for making tools and seal stones.

Geological facts

In ancient times, Red Jasper was known as the 'stone of endurance' and was often carried by warriors. It is a variety of chalcedony that contains up to 20% foreign materials which determine its opacity and color patterns.

Field identification & locations

Identify in the field by its deep red color, opacity (light will not pass through edges), and smooth, waxy feel when tumbled. It is found worldwide, with major deposits in Brazil, India, Russia, and the USA (California and Oregon).