Back to Character on shell
The pieces of shell or bone, normally from ox scapulae or turtle plastrons in ancient China, mainly during the late Shang Dynasty.
For example:
oracle_bone.jpg
http://www.ancientchina.co.uk/writing/explore/oraclebone.html

More information please look at:
http://www.ancientchina.co.uk/writing/explore/oraclebone.html
http://heritage-key.com/blogs/michael-kan/oracle-bones-display-beijing-national-library