sedimentary

Red Jasper (Banded Jasper)

Jasper (Silicon Dioxide, SiO2)

Hardness: 6.5–7 (Mohs scale); Color: Brick red to brownish-red with dark bands; Luster: Dull to vitreous; Crystal Structure: Hexagonal (microcrystalline/cryptocrystalline); Cleavage: None (conchoidal fracture); Specific Gravity: 2.58–2.91

Hardness: 6
Color: Brick red to brownish-red with dark bands
Luster: Dull to vitreous

Identified March 14, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed from the deposition of silica-rich fluids in volcanic ash or sedimentary rocks. The red color comes from iron inclusions (hematite). Many specimens date from the Precambrian or Paleozoic eras.

Uses & applications

Commonly used in lapidary work for cabochons, beads, and tumbled stones. Historically used for seals, talismans, and as an ornamental architectural stone.

Geological facts

Jasper was a favorite gem in the ancient world; its name can be traced back in Arabic, Persian, Hebrew, Assyrian, Greek, and Latin. It is known as the 'Supreme Nurturer' in metaphysical circles.

Field identification & locations

Identify in the field by its opaque nature (unlike agate which is translucent), its smooth 'flint-like' waxy surface when broken, and its inability to be scratched by a steel knife. Found globally, specifically in India, Russia, Brazil, and the Southwestern USA.

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