sedimentary

Red Jasper

Microcrystalline Quartz (Chalcedony), SiO2

Hardness: 6.5-7 on the Mohs scale, Color: Red to brownish-red due to iron oxide inclusions, Luster: Vitreous to dull, Crystal structure: Trigonal (microcrystalline/cryptocrystalline), Cleavage: None (exhibits conchoidal fracture), Specific gravity: 2.58-2.91

Hardness: 6

Identified July 28, 2026More sedimentary →

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Physical properties

Formation & geological history

Red jasper is formed through the hydrothermal precipitation of silica or from silica-rich sediments in marine environments, often associated with banded iron formations. The red color is imparted by iron oxide impurities incorporated during formation.

Uses & applications

Widely used for tumbled stones, cabochons in jewelry, ornamental carvings, and decorative objects.

Geological facts

Jasper has been prized since ancient times as a sacred and protective stone, used by ancient Egyptians, Greeks, and Native Americans for amulets, seals, and tools.

Field identification & locations

Can be identified by its opaque nature, deep red color, microcrystalline texture, and high hardness which easily scratches glass. Found worldwide including India, Brazil, Russia, Australia, and the USA.

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