Stunning large vintage black onyx stone pendant brooch with raised leaf design. The stone is beautiful - no scratches or scuffs at all. Mark reverse reads Mexico 925 along with the mark -25 - somewhat worn. The herringbone chain is also marked with a very tiny, illegible mark but it does acid test as sterling. Pin is 2 3/8 inches long by 1 1/4 inches wide. Herringbone chain is 28 inches long. Weight is 29 grams.