sedimentary

Jasper (Red Jasper)

Silicon Dioxide (SiO2) with Hematite inclusions

Hardness: 6.5-7 (Mohs scale); Color: Brick red to deep terracotta; Luster: Dull/Waxy; Crystal Structure: Microcrystalline (Trigonal); Cleavage: None (Conchoidal fracture); Specific Gravity: 2.58–2.91

Hardness: 6
Color: Brick red to deep terracotta
Luster: Dull/Waxy

Identified March 24, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed through the infiltration of silica in sedimentary or metamorphic rocks, often within hydrothermal veins. The red color is derived from iron (hematite) impurities. These specimens often date back millions of years to any geological period since the Precambrian.

Uses & applications

Extensively used as a gemstone for jewelry (cabochons, beads), decorative ornaments, and metaphysical stones. Historically used for making tools and seals due to its toughness.

Geological facts

Red Jasper has been known as the 'stone of endurance' for centuries. It was used in Ancient Egypt for protective amulets and was frequently featured in the breastplates of high priests.

Field identification & locations

Identify by its opaque nature (it does not transmit light even on thin edges), its characteristic conchoidal fracture, and extreme hardness (will scratch glass). Commonly found in riverbeds or desert regions globally, notably in India, Brazil, and the USA.

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