metamorphic
Yellow Jade (Nephrite or Jadeite)
Nephrite: Ca2(Mg,Fe)5Si8O22(OH)2 or Jadeite: NaAlSi2O6
Hardness: 6.0-7.0 (Mohs); Color: Pale yellow to golden honey; Luster: Vitreous to greasy; Crystal structure: Monoclinic (fibrous/granular); Specific gravity: 2.9-3.3
- Hardness
- 6
- Color
- Pale yellow to golden honey
- Luster
- Vitreous to greasy
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Physical properties
Hardness: 6.0-7.0 (Mohs); Color: Pale yellow to golden honey; Luster: Vitreous to greasy; Crystal structure: Monoclinic (fibrous/granular); Specific gravity: 2.9-3.3
Formation & geological history
Formed through regional metamorphism. Nephrite develops from metamorphism of magnesium-rich limestones (dolostones), while Jadeite forms in high-pressure, low-temperature subduction zones.
Uses & applications
Used primarily in jewelry, ornamental carvings, statuettes, and metaphysical collecting.
Geological facts
Yellow jade is highly prized in Chinese culture as a symbol of wealth and good fortune. While typically known in green, the yellow variety gets its color from iron inclusions within the crystal lattice.
Field identification & locations
Identify by its waxy 'soapy' feel and exceptional toughness (resistance to breakage). It is commonly found in river deposits in China, Myanmar, and British Columbia. Collectors should look for translucency and oil-like luster.
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