serendibite

noun
seren·​dib·​ite | \ ¦serən¦diˌbīt, səˈrendə̇ˌb-\
plural -s

Definition of serendibite

: a mineral (Ca,Mg)5Al5B2Si2O10 consisting of a silicate and borate of calcium, magnesium, and aluminum and occurring in irregular blue grains in Sri Lanka

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History and Etymology for serendibite

from Serendib, Serendip, former name for Ceylon (from Arabic Sarandīb) + English -ite

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