mineral

Red Jasper

Silicon Dioxide (SiO2) with iron oxide impurities

Hardness: 6.5-7 on Mohs scale; Color: Deep Brick Red to Reddish-Brown; Luster: Vitreous to dull; Crystal Structure: Microcrystalline/Cryptocrystalline; Cleavage: None; Specific Gravity: 2.58-2.91

Hardness: 6
Color: Deep Brick Red to Reddish-Brown
Luster: Vitreous to dull

Identified May 16, 2026More mineral →

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Physical properties

Hardness: 6.5-7 on Mohs scale; Color: Deep Brick Red to Reddish-Brown; Luster: Vitreous to dull; Crystal Structure: Microcrystalline/Cryptocrystalline; Cleavage: None; Specific Gravity: 2.58-2.91

Formation & geological history

Formed through the infiltration of silica-rich fluids into sediment or volcanic ash, commonly during the Jurassic or Cretaceous periods. Its red color is derived from iron inclusions.

Uses & applications

Used primarily in lapidary arts, jewelry (cabochons and beads), ornamental carvings, and as a popular semi-precious collector's stone.

Geological facts

Red Jasper has been used since ancient times for amulets and seals. It is often referred to as a stone of endurance or the 'stone of vibrancy' in folklore.

Field identification & locations

Identify by its opaque red color and high hardness (it will scratch glass). Look for it in river beds or areas with exposed sedimentary rock. It does not show light through it like carnelian would.

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