Red Jasper (possibly Orbicular)

Physical Properties

Hardness: 6.5-7 (Mohs scale); Color: Brick red with cream/white orbicular spots; Luster: Vitreous to waxy; Structure: Microcrystalline; Cleavage: None (conchoidal fracture); Specific Gravity: 2.58-2.91

Formation & Geological History

Formed from the deposition of silica-rich fluids in volcanic or sedimentary environments. The red color comes from iron impurities; the orbital patterns occur as silica crystallizes in radial structures.

Uses & Applications

Used primarily in lapidary arts for cabochons, beads, and decorative carvings. It is also a popular collector's stone and used in metaphysical practices.

Geological Facts

Jasper is an opaque variety of chalcedony. It has been used for millennia; in the ancient world, it was often used for cylinder seals and amulets.

Field Identification & Locations

Identify in the field by its opacity (it does not transmit light even on thin edges), its hardness (can scratch glass), and its distinctive smooth, waxy feel when polished.

Identified on: 4/16/2026

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