This is certainly a very impressive emerald and diamond pendant. The rose diamonds are set in silver, and the emeralds are set in unmarked but acid tested, 18 carat gold. The piece contains 5 emeralds, and my eyes are crossing trying to count the diamonds. The piece measures 2 and 1/2 inches long and 3/4 of an inch wide. This lovely piece is circa 1780, and Spanish.