... 1. Material is 412 #stainless steel and bone china.2. The bone china is much better than the ordinary procelain ... harder to chip, and stronger than hard porcelain, bone china has become the most popular type of porcelain ... some countries.4. There are trace elements in the bone china such as Ferrum, Zinc, Calcium and so on ... use value.7. For a long term,the bone china is only used by the blue-blooded or ...