carve hardness thai baht 18 k yellow solid g/f gold jewelry bangle bracelet ba09 heavy, Black

9ct gold jewellery 9ct gold is 37.5% pure gold, consisting of 9 parts pure gold and 15 parts other metal/s (9/24) 18ct gold jewellery 18ct gold is 75% pure gold, consisting of 18 parts pure gold and 6 parts other metal/s (18/24).