sedimentary

Red Jasper

Jasper (Silicon Dioxide, SiO2)

AI-generated identification · may be incorrect

Hardness: 6.5-7 (Mohs scale); Color: Brick red to brownish-red with dark streaks; Luster: Dull to Vitreous/Waxy; Crystal Structure: Microcrystalline; Cleavage: None (Conchoidal fracture); Specific Gravity: 2.58–2.91.

Hardness: 6
Color: Brick red to brownish-red with dark streaks
Luster: Dull to Vitreous/Waxy

Identified April 28, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed through the deposition of silica from volcanic ash or water in sedimentary environments. Its red color is derived from high iron content (hematite inclusions).

Uses & applications

Commonly used in jewelry (cabochons, beads), small decorative carvings (like the elephant shown), ornamental items, and stone mosaics.

Geological facts

Jasper is an opaque variety of chalcedony. Historically, it was known as the 'stone of endurance' and has been used in seals and amulets since ancient times.

Field identification & locations

Identify in the field by its opacity (even on thin edges), its characteristic 'brick' red color, and its ability to scratch glass. It is commonly found in India, Russia, Brazil, and the USA (southwest states).