VINTAGE STERLING SILVER 925 MARCASITE NECKLACE WITH BLACK SEMI PRECIOUS STONEWeight: 6.84 grams Size: 18 1/2" inches long. Center of pendant with black semi precious stone is about 1" wide Markings: 925 stamped on the back side of pendant and on clasp Please see photos for more detail. All of my items are described to the best of my knowledge. All pictures are of actual item you will receive. Please pay within 3 days of end of auction. I currently ship within the US only. I come across new and unique items all the time so please be sure to add me to your favorite sellers ! and check out my other items ! All of my auctions are listed with no reserve price. Returns and refunds are accepted and given only if item is not as described. Thank you for your interest. This exqusite necklace has the precious gemstone, black onyx.