mineral
Yellow Jasper
SiO2
AI-generated identification · may be incorrectHardness: 6.5-7; Color: Yellow, mustard, ochre; Luster: Vitreous to dull; Crystal structure: Microcrystalline; Cleavage: None; Specific gravity: 2.58-2.91
- Hardness
- 6
- Color
- Yellow, mustard, ochre
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6.5-7; Color: Yellow, mustard, ochre; Luster: Vitreous to dull; Crystal structure: Microcrystalline; Cleavage: None; Specific gravity: 2.58-2.91
Formation & geological history
Forms from silica-rich fluids in sedimentary or volcanic environments, often with iron inclusions that provide the yellow color.
Uses & applications
Often used for lapidary work, tumbling, cabochons, and ornamental carving.
Geological facts
Jasper is an opaque variety of chalcedony. The yellow color is primarily due to the presence of goethite or other iron oxides.
Field identification & locations
Identify by its opaque nature, yellow color, waxy to dull luster (when unpolished), and hardness (scratches glass). Commonly found worldwide in areas with silica-rich deposits.
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