sedimentary

Red Jasper

Jasper (Silica with Iron Oxide inclusions), SiO2

Hardness: 6.5-7 (Mohs); Color: Deep red to reddish-brown; Luster: Dull to Vitreous; Crystal Structure: Hexagonal (Microcrystalline quartz); Cleavage: None (Conchoidal fracture); Specific Gravity: 2.58-2.91

Hardness: 6
Color: Deep red to reddish-brown
Luster: Dull to Vitreous

Identified April 11, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed through the deposition of silica from mineral springs or hydrothermal veins. Its distinct red color comes from iron (hematite) inclusions that were present during its formation or introduced later through groundwater. It can be found in sedimentary environments and as nodules in volcanic rocks.

Uses & applications

Commonly used in lapidary work for cabochons, beads, and tumbled stones. Since antiquity, it has been used in jewelry, seals, and ornamentation. It is also a popular collector stone and used in metaphysical practices.

Geological facts

Jasper has been a popular gemstone since ancient times; it is mentioned in the Bible and was favored by the Babylonians and Egyptians for protective amulets. It is an opaque variety of chalcedony.

Field identification & locations

Identify in the field by its opacity, smooth conchoidal fracture, and inability to be scratched by a steel knife. It is commonly found in riverbeds, beaches, and desert areas worldwide, especially in India, Brazil, and the USA (Oregon, Idaho, California).

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