gemstone
Jade (Nephrite)
Ca2(Mg,Fe)5Si8O22(OH)2
AI-generated identification · may be incorrectHardness of 6-6.5 on Mohs scale, olive to dark green color, greasy to vitreous luster, microcrystalline monoclinic crystal structure, specific gravity around 2.9-3.0.
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Physical properties
Hardness of 6-6.5 on Mohs scale, olive to dark green color, greasy to vitreous luster, microcrystalline monoclinic crystal structure, specific gravity around 2.9-3.0.
Formation & geological history
Formed through metamorphic processes involving the metasomatism of serpentinites or dolomitic limestones under high pressure and low temperature.
Uses & applications
Widely used in fine jewelry, intricate carvings, ornamental objects, and historical weaponry due to its extreme toughness.
Geological facts
Nephrite jade is famously tougher than steel due to its interlocking fibrous crystal structure, making it historically preferred for ancient tools and weapons.
Field identification & locations
Identify by its high toughness, greasy luster, and specific gravity; commonly found in river pebbles and alluvial deposits in British Columbia, China, and New Zealand.
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