mineral

Red Jasper

Silicon Dioxide (SiO2) with Iron impurities

Hardness: 6.5-7 (Mohs); Color: Red, terracotta, or brownish-red; Luster: Dull to vitreous; Crystal Structure: Trigonal/Microcrystalline; Cleavage: None; Specific Gravity: 2.58-2.91

Hardness: 6
Color: Red, terracotta, or brownish-red
Luster: Dull to vitreous

Identified March 7, 2026More mineral →

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Physical properties

Hardness: 6.5-7 (Mohs); Color: Red, terracotta, or brownish-red; Luster: Dull to vitreous; Crystal Structure: Trigonal/Microcrystalline; Cleavage: None; Specific Gravity: 2.58-2.91

Formation & geological history

Formed through the infiltration of silica in volcanic or sedimentary rocks, often enriched with iron oxide during deposition. It occurs in hydrothermal veins or as nodules in massive sedimentary formations.

Uses & applications

Used widely in jewelry (cabochons, beads), decorative ornaments, stone carvings, and as a healing stone in metaphysical practices. Historically used for making tools due to its conchoidal fracture.

Geological facts

Red Jasper has been used as a sacred stone by many cultures, including the Ancient Egyptians who associated it with the blood of Isis. It is a variety of chalcedony and is opaque due to high mineral inclusions.

Field identification & locations

Identify in the field by its deep red color, extreme hardness (will scratch glass), and smooth, conchoidal fracture (curved surfaces). It is commonly found in India, Brazil, USA (western states), and South Africa.

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