Yellow Jasper

Physical Properties

Hardness: 6.5 - 7 (Mohs scale), Color: Mustard yellow to brownish-yellow, Luster: Dull to waxy, Crystal Structure: Hexagonal (Microcrystalline), Cleavage: None (Conchoidal fracture), Specific Gravity: 2.58 - 2.91

Formation & Geological History

Formed from the deposition of silica from water solutions or volcanic ash into sedimentary environments; the yellow color is typically caused by iron oxide (goethite) inclusions. It can form in various geological ages.

Uses & Applications

Used primarily as a gemstone for jewelry (cabochons, beads), decorative carvings, and as a popular specimen for rock tumbling and metaphysical collections.

Geological Facts

Jasper has been used as a sacred stone by various cultures for millennia. Yellow Jasper specifically is often referred to as a 'stone of endurance' in metaphysical circles and has been used in amulets since ancient times.

Field Identification & Locations

Identify in the field by its opacity (unlike translucent citrine), its hardness (will scratch glass), and its smooth, waxy feel when water-worn. Commonly found in riverbeds or desert regions globally.

Identified on: 4/25/2026

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