Jasper

Physical Properties

Hardness: 6.5-7 (Mohs scale), Color: Green, brown, and translucent bands, Luster: Vitreous to waxy, Crystal Structure: Hexagonal (microcrystalline/cryptocrystalline), Cleavage: None, Specific Gravity: 2.6-2.9

Formation & Geological History

Formed from the deposition of silica-rich fluids in cracks and cavities of volcanic or sedimentary rocks. This specimen shows water-worn tumbling, likely from a river or beach environment.

Uses & Applications

Commonly used in jewelry, lapidary art, ornaments, and as pocket stones or for metaphysical collections.

Geological Facts

Jasper is an opaque variety of chalcedony. The name comes from the Greek word 'iaspis', meaning spotted stone. It has been used for seals and amulets since the 4th millennium BCE.

Field Identification & Locations

Identify by its hardness (it will scratch glass) and its smooth, waxy feel when polished. Commonly found in coastal or riverbed gravels in regions with volcanic history.

Identified on: 4/13/2026

Mode: Standard