sedimentary

Red Jasper (Heliotrope family variant)

Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)

Hardness: 6.5–7 (Mohs scale). Color: Opaque brick red to brownish-red with yellowish and dark green patches. Luster: Vitreous to waxy. Crystal Structure: Hexagonal/Trigonal (microcrystalline/cryptocrystalline). Cleavage: None (conchoidal fracture).

Hardness: 6
Luster: Vitreous to waxy

Identified April 15, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed from the deposition of silica from volcanic sources or groundwater in cracks and cavities. Its red color is derived from high Iron Oxide (Hematite) content during its formation process, which can date back millions of years depending on the stratigraphic layer.

Uses & applications

Used primarily as a gemstone for jewelry (cabochons, beads), decorative carvings, and as a popular specimen for rock tumbling. Historically used for making tools and seals.

Geological facts

Jasper was a favorite gem in the ancient world; its name can be traced back in Hebrew, Assyrian, Persian, Greek, and Latin. It is often referred to as the 'Supreme Nurturer' in metaphysical circles.

Field identification & locations

Identify in the field by its opaque nature (it does not transmit light even on thin edges), its smooth conchoidal fracture patterns, and its ability to scratch glass. Commonly found in riverbeds and coastal areas globally, notably in India, Brazil, and the USA.

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