metamorphic
Green jade bangle
Jadeite (NaAlSi₂O₆) or nephrite, a tremolite–actinolite amphibole
AI-generated identification · may be incorrectSmooth polished surface, translucent to opaque green color, vitreous to waxy luster, hardness about 6–7 Mohs, tough interlocking fibrous or granular texture, and no obvious cleavage. The image cannot reliably distinguish jadeite from nephrite; the even green appearance may also reflect treatment or another green stone.
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Physical properties
Smooth polished surface, translucent to opaque green color, vitreous to waxy luster, hardness about 6–7 Mohs, tough interlocking fibrous or granular texture, and no obvious cleavage. The image cannot reliably distinguish jadeite from nephrite; the even green appearance may also reflect treatment or another green stone.
Formation & geological history
Jade forms through high-pressure metamorphism and metasomatism, commonly in subduction-zone environments; jadeite deposits are generally Mesozoic to Cenozoic, while nephrite occurs in varied metamorphic settings. Major sources include Myanmar, Guatemala, China, Canada, New Zealand, and Russia.
Uses & applications
Carved into bangles, beads, ornaments, and cabochons; historically important in Chinese, Mesoamerican, and Māori cultures. Quality jade is valued for color, translucency, texture, and absence of fractures.
Geological facts
Jade is exceptionally resistant to breaking because of its interlocking microstructure. A specific identification requires density, refractive index, spectroscopy, or gemological testing.
Field identification & locations
Field clues include unusual toughness, cool feel, waxy luster, and resistance to scratching by steel, but many imitations exist. The broad, polished bangle appears jade-like, though visual identification alone is uncertain.
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