pyroaurite

noun
py·ro·aurite | \ˌpīrōˈȯˌrīt\
plural -s

Definition of pyroaurite 

: a mineral Mg6Fe2(OH)16CO3.4H2O that is a hydrous basic carbonate of magnesium and iron

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History and Etymology for pyroaurite

Swedish pyroaurit, from pyr- + Latin aurum gold + Swedish -it -ite; from its resemblance to gold after being heated

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