Glass Cabochons referred to as Kemp used to be set in gold many years back (see pic) and were treasured heirloom pieces. Kemp means red color in some Indian Languages (Telugu and kannada), but kemp stones (though generally red) can also be green or blue*. These were called Vadassery jewelry. Glass, colored using natural colors was cut into cabochons and set in frames. Traditionally these stones were flatbacks, but I am seeing use of cut (faceted) stones as well. However, these stones are mostly spinels and not glass kemps. Today, sadly however, the kemp jewelry refers to Imitations made in copper or iron, with gold polish and glass stones.