This is an important reference to one of China's most famous stones--Kun stone from Jiangsu province. These delicate appearing and intricate stones are actual mineral formations. Kun stones are listed in Du Wan's Yulin Shipu (Stone Catalog of Cloudy Forest) published between 1126 and 1130 CE. This volume is the most comprehensive work about these stones, their collectors, and poems written about these stones. Non-Chinese readers can learn about these stones from the many color illustrations.
