Jade (Nephrite)
Mineral NameJade (Nephrite)
Chemical FormulaCa2(Mg,Fe)5Si8O22(OH)2
Mohs Hardness6
Crystal Systemmonoclinic
Lustervitreous
Streak Colorwhite
CleavageGood in two directions at 56° and 124°, but rarely observed due to fibrous nature
Fracturesplintery
Specific Gravity2.95
Colorsdark green, green
Transparencytranslucent
Type LocalityNew Zealand, Canada, Russia, China, USA
Mineral GroupSilicates (Amphibole Group)
Usesjewelry, carving, ornamental objects, tools
Associated Mineralsserpentine, chlorite, talc, magnetite
Rarityuncommon
Description
This image displays a polished, dark green, curved ear ornament, characteristic of nephrite jade, with a smooth surface and a drilled hole at one end for suspension.
Geological Context
Nephrite forms primarily through regional metamorphism of ultramafic rocks (like serpentinites) or dolomitic limestones, often found in contact metamorphic zones or within subduction-related metamorphic belts.
