My study is for my collection of Chinese jade art throughout history.

The item directly to the left is a ring from the Ming dynasty, and the item directly below is a jade piece from the Tang dynasty, and serves as an accurate representation of myself prior to the morning coffee.

Some articles to peruse: http://esciencenews.com/articles/2010/05/29/revealing.ancient.chinese.secret.sticky.rice.mortar
http://www.foxnews.com/story/0,2933,448268,00.html
http://news.discovery.com/archaeology/ancient-chinese-ruler-tomb-found.html