Jianshui teapots and cups are high fired; often for many days, which result in many of them being cracked or damaged. The ones which survive, are truly special and they seem to know it. They ring like glass and feel completely different from the other forms of pottery in China. The pots are unglazed but can be polished to a high gloss. Unpolished teapots and cups, can also be 'yang-ed' or raised like Yixing teaware and absorb tea oils which help to develop a shiny exterior over time.