Antique Chinese Nephrite or Serpentine Jade Dragon Belt Buckle / Hook 75.4 g. You are viewing a fine quality Chinese hand carved and polished Nephrite Jade belt buckle. The buckle measures 5 long. It is 3/4″ wide and 3/4″ high. There is some wear all over the buckle from use. The buckle weighs 75.4 grams.