sedimentary

Red Jasper (Polished)

Silicon Dioxide (SiO2) with Hematite inclusions

AI-generated identification · may be incorrect

Hardness: 6.5-7 Mohs; Color: Brick red to brownish-red; Luster: Vitreous to waxy; Crystal structure: Hexagonal/Trigonal (Microcrystalline); Cleavage: None (Conchoidal fracture); Specific gravity: 2.58–2.91

Hardness: 6
Color: Brick red to brownish-red
Luster: Vitreous to waxy

Identified April 22, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed from the deposition of silica in hydrothermal veins or as a secondary mineral in volcanic rock or sedimentary beds. The red color is caused by iron (hematite) inclusions within the silica.

Uses & applications

Commonly used for ornamental decorations, jewelry (cabochons and beads), pocket stones, and lapidary work.

Geological facts

Jasper has been used as a gemstone since antiquity; it was known as the 'supreme nurturer' in ancient folklore and was often used for seals and amulets in Mesopotamia and Egypt.

Field identification & locations

Identify in the field by its opaque nature (unlike translucent carnelian), its high hardness that scratches glass, and its smooth, waxy surface when polished. Found worldwide with major deposits in India, Brazil, and the USA.