assembled gem

assembled gem, cut jewel manufactured from two or three pieces of stone that are cemented together to create a larger stone with increased value. A doublet is composed of two pieces of material, usually cemented together at the girdle (the stone’s widest part): if the two pieces are of the same material, the gem is called a true doublet; if they are different, with the crown (above the girdle) being genuine and the pavilion (below...