Red Jasper

Physical Properties

Hardness: 6.5–7 (Mohs scale); Color: Deep brick red; Luster: Dull to waxy; Crystal structure: Trigonal (microcrystalline); Cleavage: None (conchoidal fracture); Specific Gravity: 2.6–2.9

Formation & Geological History

Formed through the accumulation of fine silica sediment and volcanic ash, often in hydrothermal or sedimentary environments. It takes on its red color from high iron content. These specimens can range from millions to billions of years old.

Uses & Applications

Predominantly used as continuous decorative stone, in lapidary work for jewelry (cabochons), as metaphysical 'healing' stones, and historically for tools requiring a sharp, durable edge.

Geological Facts

Red Jasper was traditionally known as the 'stone of endurance.' It is a member of the chalcedony family, meaning its quartz crystals are so small they can only be seen under high magnification.

Field Identification & Locations

Identify it by its opacity (unlike translucent carnelian), its high hardness (it will scratch glass), and its lack of visible grains. Commonly found in stream beds and beaches in volcanic regions.

Identified on: 4/25/2026

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