microcrystalline quartz

Red Jasper

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness of 6.5 to 7 on the Mohs scale, opaque red to reddish-brown color, and a vitreous to dull luster. It has a conchoidal fracture and no true cleavage.

Identified November 4, 2026More microcrystalline quartz →

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Physical properties

Hardness of 6.5 to 7 on the Mohs scale, opaque red to reddish-brown color, and a vitreous to dull luster. It has a conchoidal fracture and no true cleavage.

Formation & geological history

Formed from silica-rich hydrothermal solutions or chemical precipitation in marine environments, often associated with iron-rich sedimentary or volcanic rocks.

Uses & applications

Widely used for tumbled stones, cabochons, ornamental carvings, and low-cost jewelry or decorative items.

Geological facts

Red jasper has been used since ancient times for talismans, seals, and weaponry components like arrowheads. Its deep red hue comes from iron oxide impurities trapped during formation.

Field identification & locations

Identify by its distinct red opaque appearance, waxy luster, and high hardness that scratches glass. Common worldwide, particularly in alluvial deposits, riverbeds, and mountainous regions.