sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide impurities
AI-generated identification · may be incorrectHardness: 6.5-7 (Mohs scale), Color: Mustard yellow to golden brown, Luster: Vitreous to waxy, Crystal Structure: Hexagonal (trigonal) microcrystalline, Cleavage: None/Conchoidal fracture, Specific Gravity: 2.58-2.91
- Hardness
- 6
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Physical properties
Hardness: 6.5-7 (Mohs scale), Color: Mustard yellow to golden brown, Luster: Vitreous to waxy, Crystal Structure: Hexagonal (trigonal) microcrystalline, Cleavage: None/Conchoidal fracture, Specific Gravity: 2.58-2.91
Formation & geological history
Formed from silica-rich fluids depositing in volcanic ash or sedimentary beds. The yellow color is caused by the inclusion of iron oxides (goethite/limonite).
Uses & applications
Primarily used for lapidary work, jewelry (beads, cabochons), carvings, and as a popular stone for chakra healing and crystal collecting.
Geological facts
Yellow Jasper was historically revered as a protective stone that provided spiritual and physical protection during travel. It is a dense, opaque variety of chalcedony.
Field identification & locations
Look for a smooth, matte to waxy surface that cannot be scratched by a steel knife. It is commonly found in riverbeds or as nodules in volcanic regions such as those in India, Madagascar, and the USA.
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