Red Jasper

Physical Properties

Hardness: 6.5-7 (Mohs); Color: Red, earthy red, or brownish-red; Luster: Vitreous to dull; Crystal Structure: Trigonal/Microcrystalline; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.58-2.91

Formation & Geological History

Forms when silica-rich fluids permeate through volcanic rocks or sedimentary deposits, picking up hematite (iron) content which provides the red pigment. It is commonly associated with ancient seafloor hydrothermal activity or sedimentary layering.

Uses & Applications

Primarily used for lapidary work, jewelry (cabochons and beads), ornamental carvings, and as a decorative stone in landscaping. Historically used for seals and amulets.

Geological Facts

Known as the "Stone of Endurance" in some cultures, it has been used since ancient times. Legend says it was one of the stones on the High Priest\'s breastplate in the Bible.

Field Identification & Locations

Identify by its opaque red color and smooth, waxy, or matte surface. It is commonly found in gravel pits, riverbeds, and desert regions worldwide, particularly in high concentrations in areas like South Africa, Brazil, and the USA.

Identified on: 5/10/2026

Mode: Standard