What is 10KP?

Also:10k, 16, 417, =10KP* 41.6% pure gold (10 parts out of 24)

Source:Amazon.com/gp/help/jewelry/?ie=UTF8&popup=common%2Cmetal_stamp">http://www.Amazon.com/gp/help/jewelry/?ie=UTF8&popup=common%2Cmetal_stamp