mineral

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

Hardness: 6.5-7 (Mohs scale); Color: Brick red to brownish red due to iron; Luster: Vitreous to dull; Crystal Structure: Hexagonal (trigonal) microcrystalline; Cleavage: None (conchoidal fracture); Specific Gravity: 2.58-2.91

Hardness: 6
Color: Brick red to brownish red due to iron
Luster: Vitreous to dull

Identified March 9, 2026More mineral →

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Physical properties

Formation & geological history

Formed through the deposition of silica from hydrothermal solutions or in sedimentary environments where volcanic ash or fine sediment is replaced by silica. Its red color comes from high iron content. It can be found in rocks from the Precambrian to recent geological eras.

Uses & applications

Commonly used in jewelry making for cabochons and beads, ornamental carvings, pocket stones for metaphysical practices, and historically as a component in mosaics and architectural decoration.

Geological facts

Ancient Egyptians wore Red Jasper amulets shaped like the knot of Isis to protect the wearer. It is known as the 'Supreme Nurturer' in gemstone folklore. It is a variety of chalcedony that is opaque, unlike agates which are translucent.

Field identification & locations

Identify in the field by its deep red color, extreme hardness (it will scratch glass), and opaque nature. It is commonly found in riverbeds, desert pavements, and rocky beaches worldwide, notably in India, Brazil, and the Southwestern USA.

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