sedimentary
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
Hardness: 6.5-7 (Mohs scale), Color: Mustard yellow to golden brown, Luster: Vitreous to waxy, Crystal Structure: Hexagonal (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 (microcrystalline), Cleavage: None/Conchoidal fracture, Specific Gravity: 2.58-2.91
Formation & geological history
Formed via the accumulation of silica from volcanic ash or sediment in water-rich environments over millions of years; the yellow color comes from iron oxide (goethite) inclusions.
Uses & applications
Commonly used for lapidary work, jewelry (beads, cabochons), carvings, and as a pocket stone for collectors interested in metaphysical properties.
Geological facts
Yellow Jasper is known as a stone of endurance and protection; it has been used by various cultures throughout history as a talisman for safe travel.
Field identification & locations
Identify by its opaque yellow color, extreme hardness (it will scratch glass), and smooth, waxy texture. Frequently found in riverbeds, deserts, and coastal areas globally.
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