sedimentary

Red Jasper

Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)

AI-generated identification · may be incorrect

Hardness: 6.5-7 on Mohs scale; Color: Brick red with possible tan/yellow banding; Luster: Vitreous to dull; Crystal structure: Trigonal (microcrystalline); Cleavage: None (conchoidal fracture); Specific Gravity: 2.58-2.91

Hardness: 6
Color: Brick red with possible tan/yellow banding
Luster: Vitreous to dull

Identified May 18, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed through the deposition of silica from water solutions or volcanic ash, followed by microcrystalline growth. The red color is typically caused by iron inclusions. Found in sedimentary deposits and volcanic regions worldwide.

Uses & applications

Commonly used as a gemstone for jewelry, decorative carvings, metaphysical 'healing' stones, and ornamental lapidary work.

Geological facts

Jasper is an opaque variety of chalcedony. Historically, it was known as the 'supreme nurturer' and has been used in seals and amulets for thousands of years by various cultures.

Field identification & locations

Identify in the field by its opacity (unlike translucent carnelian), its high hardness, and its characteristic waxy or smooth feel when polished. Commonly found in stream beds or coastal areas in the western US, India, and Brazil.