mineral

Red Jasper

Silicon Dioxide (SiO2) with Hematite inclusions

AI-generated identification · may be incorrect

Hardness: 6.5-7 on Mohs scale; Color: Opaque brick red to brownish-red; Luster: Vitreous to dull (polished smooth/waxy); Crystal System: Trigonal (microcrystalline quartz); Cleavage: None, exhibits conchoidal fracture; Specific Gravity: 2.58-2.91.

Hardness: 6
Color: Opaque brick red to brownish-red
Luster: Vitreous to dull (polished smooth/waxy)

Identified July 26, 2026More mineral →

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Physical properties

Formation & geological history

Formed when microcrystalline quartz precipitates from hydrothermal fluids or silica-rich waters, incorporating iron oxide (hematite) inclusions that give it its distinctive opaque red color. Often found in association with volcanic rocks or sedimentary banded iron formations.

Uses & applications

Used widely in lapidary arts, gemstone jewelry, polished palm stones, decorative carvings, and beads. Popular among rock and mineral collectors.

Geological facts

Jasper has been used as a gemstone since antiquity and was prized by ancient Minoan, Egyptian, and Roman civilizations for seals, amulets, and jewelry. Its rich red color is directly caused by fine particles of hematite trapped within the quartz matrix.

Field identification & locations

Identified by its rich red color, high hardness (scratches glass), opaque appearance, and conchoidal fracture when broken. Commonly found in India, Russia, Brazil, Madagascar, and the southwestern United States.