Definitions for jadeiteˈdʒeɪ daɪt
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a hard green mineral consisting of sodium aluminum silicate in monoclinic crystalline form; a source of jade; found principally in Burma
A pyroxene mineral, a sodium aluminium silicate with the chemical formula Na(Al,Fe)SiO, found in metamorphic rocks.
see Jade, the stone
Jadeite is a pyroxene mineral with composition NaAlSi2O6. It is monoclinic. It has a Mohs hardness of about 6.5 to 7.0 depending on the composition. The mineral is dense, with a specific gravity of about 3.4. Jadeite forms solid solutions with other pyroxene endmembers such as augite and diopside, aegirine, and kosmochlor. Pyroxenes rich in both the jadeite and augite endmembers are known as omphacite. The name jadeite is derived from the Spanish phrase "piedra de ijada" which means "stone of the side". It was believed to cure kidney stones if it was rubbed against the side of the afflicted person's body. The Latin version of the name, lapis nephriticus, is the origin of the term nephrite, which is also a variety of jade. Jadeite is formed in metamorphic rocks under high pressure and relatively low temperature conditions. Albite is a common mineral of the Earth's crust, and it has a specific gravity of about 2.6, much less than that of jadeite. With increasing pressure, albite breaks down to form the high-pressure assemblage of jadeite plus quartz. Minerals associated with jadeite include: glaucophane, lawsonite, muscovite, aragonite, serpentine and quartz.
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