Bois durci it’s an antique jewelry making technique that was very popular in the middle XIX century. The craftsmans took molds and put in there sawdust from dark woods (like ebony rosewood) and mixed with a natural binder that was, almost always, blood taken from slaughterhouses. The result is a beautiful resin with a blackish brown or a deep crimson color. The best of all it’s that mostly, the bois durci pieces that remains, date from before 1890s. That’s the most gothic accesorie that everyone could wear isn’t it? Buy this one on HERE.