sedimentary

Red Jasper (possibly Brecciated Jasper or Bloodstone variety)

Jasper (Silicon Dioxide, SiO2)

Hardness: 6.5-7 on Mohs scale; Color: Red with dark grey or brown inclusions; Luster: Vitreous to waxy; Crystal structure: Trigonal (Microcrystalline); Cleavage: None (Conchoidal fracture); Specific gravity: 2.5-2.9

Hardness: 6
Color: Red with dark grey or brown inclusions
Luster: Vitreous to waxy

Identified April 4, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed through the deposition of silica from hydrothermal solutions or volcanic ash in sedimentary environments where iron oxides provide the red pigmentation. Many jaspers are millions of years old, dating back tovarious geological eras including the Mesozoic.

Uses & applications

Used primarily for lapidary work, jewelry (cabochons, beads), decorative carvings, and in metaphysical collecting.

Geological facts

Jasper is an opaque variety of chalcedony. The name comes from the Greek word 'iaspis', meaning 'spotted stone.' Historically, it was known as the 'warrior's stone' and was used in the breastplates of high priests.

Field identification & locations

Identify in the field by its opacity (unlike translucent carnelian), its high hardness (won't be scratched by a steel blade), and its smooth, waxy feel when tumbled or polished. Found worldwide with major deposits in India, Brazil, and the USA.

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