From Wewoka St Pawn of Oklahoma we have a Beautiful sterling Silver Black White Diamond Sea or Water Turtle Necklace by Johnny Yau founder of Heng Ngai. This is a very nice pendant with 45 Diamonds that are 1.15ct each or .51tcw. It is on an 18" double Long Link chain with a Spring Ring closure. It is marked 925 has been tested and is Sterling Silver and weighs 4.4 grams.n It is also marked HN hallmark for Heng Ngai founded in 1980 by Johnny Yau . See photos for more details. This necklace is pre-owned but I would consider it to be in very good condition. All our jewelry comes from Pawns from our store and we do not do the deep cleaning and buffing we should so please take that into consideration as we leave that to the new owner. We are not experts and have limited knowledge so please ask questions prior to buying. We always welcome questions and as always they will be answered in a timely manner. Please see our Facebook page wewoka pawn for more fine collectibles as well as gold and silver jewelry.