mineral

Red Jasper

Jasper (Silicon Dioxide, SiO2 with Fe2O3 inclusions)

Hardness: 6.5-7.0 (Mohs scale), Color: Brick red to brownish-red, Luster: Vitreous to dull, Crystal Structure: Trigonal (microcrystalline), Cleavage: None, Specific Gravity: 2.58-2.91

Hardness: 6

Identified March 25, 2026More mineral →

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Physical properties

Hardness: 6.5-7.0 (Mohs scale), Color: Brick red to brownish-red, Luster: Vitreous to dull, Crystal Structure: Trigonal (microcrystalline), Cleavage: None, Specific Gravity: 2.58-2.91

Formation & geological history

Formed through the deposition of silica from water or hydrothermal fluids, often in volcanic or sedimentary environments. The red color comes from iron (hematite) inclusions incorporated during the solidification process.

Uses & applications

Commonly used for lapidary work, jewelry (beads, cabochons), ornamental carvings, and as a popular specimen for crystal collecting and metaphysical purposes.

Geological facts

Jasper is an opaque variety of chalcedony. Historically, it was known as the 'supreme nurturer' and has been used since antiquity in cylinder seals, amulets, and architectural decorations in ancient Egypt and Mesopotamia.

Field identification & locations

Identify by its opaque nature (unlike translucent carnelian), smooth waxy feel when polished, and inability to be scratched by a steel knife. It is frequently found in river beds or as nodules in volcanic rock. Common locations include India, Brazil, USA, and South Africa.

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