thorite

noun
tho·​rite | \ˈthȯr-ˌīt \

Definition of thorite 

: a rare mineral that is a brown to black or sometimes orange-yellow silicate of thorium resembling zircon

First Known Use of thorite

1832, in the meaning defined above

History and Etymology for thorite

Swedish thorit, from New Latin thorium

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The first known use of thorite was in 1832

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Britannica.com: Encyclopedia article about thorite

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