I have looked and looked for information on the Chalcedony Quail image attached. I purchased this in a consignment antique store near Beijing in 2001. It measures 4.38 inches high by 4.75 inches wide by 1.60 inches thick.

The chalcedony which you describe as coming from NE China closely resembles the chalcedony used in my carving. Do you have any idea on how to definitively locate the source and era of the particular type of chalcedony?

Thank you for your input!