Jasper Breccia

Physical Properties

Hardness: 6.5-7 (Mohs scale); Color: Red, yellow, brown, and tan; Luster: Vitreous to waxy; Crystal structure: Trigonal (microcrystalline/cryptocrystalline); Cleavage: None; Specific Gravity: 2.6-2.9

Formation & Geological History

Formed when jasper is fractured by tectonic activity and then cemented back together by silica or other minerals over millions of years. This specimen shows water-worn, smoothed surfaces, likely from river transport.

Uses & Applications

Used in gemstone carvings, jewelry (cabochons), lapidary art, and as a decorative stone in landscaping or interior design.

Geological Facts

The word jasper is derived from the Greek iaspis, meaning 'spotted stone.' Brecciated varieties are particularly prized for their mosaic-like patterns caused by the broken and re-healed fragments.

Field Identification & Locations

Identify in the field by its hardness (will scratch glass), opaque nature even on thin edges, and angular internal fragments. Commonly found in river beds and sedimentary deposits globally.

Identified on: 4/28/2026

Mode: Standard