It looks like 2 thin outer layers of leather,with a medium blue core. The outer leather layer are varying colors on different pieces, tan, maroon, black. I think it's probably junk.
Not sure if this is the right place to post this but.... I was looking at the bag of leather scraps sold in HobbyLobby, thinking I could use them for practice. Most of the leather looks like it bonded to some kind of blue foam rubber core. Anybody know what this stuff is? I don't think it is something I could practice tooling.