Red Jasper (possibly banded)

Physical Properties

Hardness: 6.5-7 (Mohs scale); Color: Brick red to brownish-red with dark bandings; Luster: Dull/waxy; Crystal Structure: Microcrystalline; Cleavage: None/Conchoidal fracture; Specific Gravity: 2.58–2.91

Formation & Geological History

Formed from the deposition of silica from water-saturated solutions, often in volcanic or sedimentary environments where iron oxides are present to provide the red pigment. It is common in Precambrian banded iron formations.

Uses & Applications

Used primarily for lapidary work, jewelry (cabochons, beads), decorative ornaments, and as a popular collectable for beginners due to its beauty and durability.

Geological Facts

Ancient cultures around the world referred to Jasper as the 'Supreme Nurturer.' The red variety specifically contains significant amounts of hematite, which gives it its deep earthy color.

Field Identification & Locations

Identify in the field by its hardness (cannot be scratched by steel), opaque appearance, and characteristic brick-red color. Very common in the Lake Superior region and the Southwestern United States.

Identified on: 4/30/2026

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