Somehow disabled diamonds on my server, help?

[woguef00tball]

I don't know what I did, i tried to give a friend a diamond pick through console commands and now no one can build any items that involve diamonds. Help would be greatly appreciated!

[Axle]

This post is very vague and I doubt anyone would be able to help with the information provided. The information we would need would include: Any recent changes to the server configurations, a plugin list, version information.