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andalusite in British English
(ˌændəˈluːsaɪt)
noun
a grey, pink, or brown hard mineral consisting of aluminium silicate in orthorhombic crystalline form. It occurs in metamorphic rocks and is used as a refractory and as a gemstone. Formula: Al2SiO5
andalusite in American English
(ˌændəˈluˌsaɪt)
noun
a very hard, orthorhombic silicate of aluminum, Al2SiO5, usually found in schist, slate, or other metamorphic rocks and used to make various high-temperature materials andas a gem
Word origin
after Andalusia, where it was discoveredImage ofandalusite
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