sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Hardness: 6.5-7 on Mohs scale. Color: Mustard yellow to golden brown. Luster: Vitreous to waxy. Structure: Microcrystalline quartz (cryptocrystalline). Cleavage: None, conchoidal fracture. Opaque.
- Hardness
- 6
- Color
- Mustard yellow to golden brown
- Luster
- Vitreous to waxy
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Physical properties
Hardness: 6.5-7 on Mohs scale. Color: Mustard yellow to golden brown. Luster: Vitreous to waxy. Structure: Microcrystalline quartz (cryptocrystalline). Cleavage: None, conchoidal fracture. Opaque.
Formation & geological history
Formed primarily in sedimentary environments when silica-rich fluids permeate through volcanic ash or other sediments, solidifying over time. Its yellow color is derived from high iron oxide (goethite or limonite) content.
Uses & applications
Commonly used in lapidary work for cabochons, beads, and pocket stones. Also used as a healing stone in metaphysical practices and as an ornamental landscaping stone.
Geological facts
Yellow Jasper is known as a stone of endurance and protection. It has been used by various civilizations for thousands of years, primarily into seals, amulets, and decorative jewelry.
Field identification & locations
Identify by its smooth, waxy texture and inability to be scratched by a steel knife. It is commonly found in riverbeds, beaches, and desert plains globally, often as water-worn pebbles or cobbles.
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