mineral

Red Jasper

Silicon Dioxide (Microcrystalline Quartz), SiO2

Hardness of 6.5 to 7 on the Mohs scale, red to reddish-brown color due to iron inclusions, waxy to dull luster, trigonal crystal system with microcrystalline structure, conchoidal fracture with no true cleavage, specific gravity of 2.58 to 2.91.

Identified August 4, 2026More mineral →

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Physical properties

Formation & geological history

Formed through the hydrothermal alteration or precipitation of silica-rich fluids in sedimentary or volcanic environments, often involving iron-rich sediments, dating back from Precambrian to recent geological times.

Uses & applications

Commonly used in cabochons, beads, ornamental carvings, lapidary art, and as a popular specimen for mineral collectors.

Geological facts

Red jasper has been used since ancient times for amulets, seals, and weaponry like arrowheads due to its toughness and ability to take a high polish. Ancient Egyptians often carved it into amulets representing the girdle of Isis.

Field identification & locations

Easily identified in the field by its opaque red color, conchoidal fracture, and hardness that easily scratches glass. Found worldwide, with significant deposits in India, Brazil, Russia, and the western United States.

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