sedimentary

Red Jasper (Brecciated or Mottled)

Silicon Dioxide (SiO2) with iron oxide inclusions

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs scale); Color: Brick red to brownish-red with dark streaks; Luster: Vitreous to waxy; Crystal structure: Trigonal/Microcrystalline; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.58-2.91

Hardness: 6
Color: Brick red to brownish-red with dark streaks
Luster: Vitreous to waxy

Identified April 28, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed through the deposition of silica from hydrothermal fluids or in sedimentary environments. Its red color is derived from high iron content. The mottled appearance suggests it may have undergone minor fracturing and re-healing with hematite or magnetite during its geological history.

Uses & applications

Commonly used for lapidary work, jewelry making (cabochons), river rock landscaping, and as a popular 'healing crystal' or meditation stone in the metaphysical community.

Geological facts

Jasper is an opaque variety of chalcedony. It has been used since antiquity for seals, amulets, and ornamentation, and was specifically mentioned in diverse historical texts as a 'supreme nurturer' stone.

Field identification & locations

Identify in the field by its opacity (unlike translucent carnelian), its inability to be scratched by a steel knife, and its characteristic dull/waxy luster when unpolished. Frequently found in riverbeds and glacial deposits in areas with volcanic or iron-rich sedimentary history.