mineral

Red Jasper

Jasper (Silicon Dioxide, SiO2)

Hardness: 6.5–7 (Mohs); Color: Deep brick red to brownish-red; Luster: Dull to vitreous; Crystal structure: Hexagonal (microcrystalline/cryptocrystalline); Cleavage: None; Specific gravity: 2.58–2.91

Hardness: 6
Color: Deep brick red to brownish-red
Luster: Dull to vitreous

Identified March 24, 2026More mineral →

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Physical properties

Formation & geological history

Formed through the accumulation of fine silica and volcanic ash or clay in sedimentary or volcanic environments. Its red color is derived from iron (hematite) inclusions. Found in rocks of various geological ages from Precambrian to Cenozoic.

Uses & applications

Used primarily for jewelry (cabochons), ornamental carvings, stone mosaics, and as a healing stone in metaphysical communities. Historically used for seal stones and tools.

Geological facts

Ancient Egyptians often wore red jasper amulets for protection. It is a variety of chalcedony that is specifically opaque rather than translucent due to its high mineral impurity content.

Field identification & locations

Identify in the field by its distinctive red color, opacity, and smooth conchoidal fracture. Commonly found in riverbeds and mountainous regions in South Africa, Brazil, India, and the USA. It will scratch glass but cannot be scratched by a steel knife.