mineral

Red Jasper

Silicon Dioxide (SiO2) with Hematite (Fe2O3) inclusions

Hardness: 6.5-7 (Mohs scale), Color: Brick red to brownish-red, Luster: Vitreous to dull (waxy when polished), Crystal Structure: Hexagonal (trigonal) microcrystalline, Cleavage: None/Conchoidal fracture, Specific Gravity: 2.58-2.91

Hardness: 6

Identified March 25, 2026More mineral →

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Physical properties

Formation & geological history

Formed through the deposition of silica from water or hydrothermal vents, often in sedimentary environments or volcanic ash. The red color is derived from high iron content (hematite) during formation. It can be found in strata dating back to the Precambrian era.

Uses & applications

Used widely in lapidary work for cabochons, beads, and tumbled stones. In industry, it is used for bearings and seals due to its hardness. It is also a popular specimen for metaphysical collections and ornamental decorative objects.

Geological facts

In ancient times, Red Jasper was known as the 'stone of endurance' and was used by Egyptian warriors for protection. It is an opaque variety of chalcedony and frequently contains up to 20% mineral impurities which determine its patterns and color depth.

Field identification & locations

Identify in the field by its opaque deep red color, smooth texture when weathered, and lack of transparency even on thin edges. Common locations include Brazil, India, USA (Southwest), and South Africa. Collectors should look for even color distribution or interesting banding.

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