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GIBBSITE

Webster's Dictionary 1828

GIBBS'ITE, noun A mineral found at Richmond, in Massachusetts, and named in honor of George Gibbs, Esq. It occurs in irregular stalactical masses, which present an aggregation of elongated, tuberous branches, parallel and united. Its structure is fibrous, the fibers radiating from an axis. Its colors are a dirty white, greenish white and grayish.