Carbonado n. (pl. carbonadoes) (Min.) A black variety of diamond, found in Brazil, and used for diamond drills. It occurs in irregular or rounded fragments, rarely distinctly crystallized, with a texture varying from compact to porous.
... city with hand-granado, Or the generall with a bastonado, - But no way for a Rump like a carbonado, ... — Cavalier Songs and Ballads of England from 1642 to 1684 • Charles Mackay
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