Hypertext Webster Gateway: "Carbonadoes"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Carbonado \Car`bo*na"do\, n.; pl. {Carbonadoes}. [Pg.,
carbonated.] (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.
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