Yellow Jasper

Physical Properties

Hardness: 6.5-7 (Mohs); Color: Mustard yellow to golden brown; Luster: Vitreous to waxy; Crystal structure: Trigonal/Microcrystalline; Cleavage: None; Fracture: Conchoidal

Formation & Geological History

Formed through the accumulation of fine-grained silica in sedimentary environments or hydrothermal veins. The yellow color is caused by the inclusion of iron-rich goethite. These specimens can range in age from millions to hundreds of millions of years.

Uses & Applications

Used primarily in lapidary work for making cabochons, beads, and pocket stones. It is also a popular collector's item and used in metaphysical practices as a grounding stone.

Geological Facts

Jasper is an opaque variety of chalcedony. The name comes from the Greek word 'iaspis', meaning 'spotted stone.' Yellow Jasper was historically used by diverse cultures as a stone of protection during spiritual travel and physical journeying.

Field Identification & Locations

Identify in the field by its opaque nature (unlike agate), smooth waxy feel, and characteristic conchoidal fracture (shell-like curves). Commonly found in riverbeds or desert regions of South Africa, Brazil, and the Western United States.

Identified on: 4/19/2026

Mode: Standard