bois-durci

from The Century Dictionary.

• noun In com., an artificial hard wood made of a paste of blood and the sawdust of mahogany, ebony, and other fine-grained woods, molded into various forms. When hardened it takes a high polish.

from the GNU version of the Collaborative International Dictionary of English.

• A hard, highly polishable composition, made of fine sawdust from hard wood (as rosewood) mixed with blood, and pressed.