mineral
Yellow Jasper
Chalcedony (SiO2) with iron oxide inclusions
AI-generated identification · may be incorrectHardness: 6.5-7 (Mohs scale), Color: Yellow to brownish-yellow, Luster: Vitreous to waxy, Crystal structure: 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: Yellow to brownish-yellow, Luster: Vitreous to waxy, Crystal structure: Trigonal/Microcrystalline, Cleavage: None (conchoidal fracture), Specific Gravity: 2.58-2.91
Formation & geological history
Formed via the deposition of silica from water-rich solutions into volcanic or sedimentary cavities; the yellow color is typically due to Goethite or other iron hydroxide inclusions.
Uses & applications
Commonly used for lapidary work, cabochons, beads, decorative carvings, and as a collector's stone.
Geological facts
Jasper is an opaque variety of chalcedony. Historically, it has been used for seals and amulets, and it is known for its smooth, river-tumbled appearance in alluvial deposits.
Field identification & locations
Identifiable by its smooth waxy surface, lack of transparency (opaque), and resistance to scratching from steel. Often found in riverbeds and coastal regions.
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Epidote
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Granite
Granite (Phaneritic intrusive igneous rock)
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