Khỏe .999 Bạc & Sterling .925 Bạc 1. Khỏe .999 Silver Fine silver is the closest metal to the pure element silver. It is marked .999 điều đó chỉ ra 99.9% sự thuần khiết. Các 0.1% remainder consists of trace elements of insignificant quantity. Fine silver has a more vitreous luster than the bright polish of sterling. It appears […]
