Petuntse (白墩子 in pinyin: bai2 dun1 zi0), also spelled petunse, also known as china stone, is a granite-derived feldspar. It is one of the two ingredients used in making chinas[?] (the other ingredient being kaolin).
... Electric Railways of London) are now closed and, for the most part, abandoned.
Aldwych tube station
Blake Hall tube station[?]
British Museum tube ...