[An earlier form of CULET q.v., the Fr. equivalent being culasse, deriv. of cul bottom; app. confounded with COLLET sb.1 sense 3.] The horizontal base of a diamond when cut as a brilliant; also called CULET.
1675. Lond. Gaz., 1050/4. Lost … a short hart Diamond, weighing about 18 Grains … 4 Rights and the Collet [printed coller] pollished, the Stone being about half made.
1761. Wilson, in Phil. Trans., LII. 444. At the table surface, and at the collet, or opposite surface.
1884. F. J. Britten, Watch & Clockm., 214. The under surface is also cut in facets and terminates nearly in a point called the collet or culette.
