Is this zinc contaminated lead?

[letsmeltlead2693]

Here is a pic of suspect zinc contaminated lead. This lead pours like wet sand or as some people say like oatmeal. The ingots have a very noticeable ring to them and a slightly wrinkled surface. They are very similar in color to some zinc I melted.

http://www.jigcraft.com/jigcraft/attachment.php?aid=2887