Board Thread:Bug Reports/@comment-132.198.246.251-20150224021026/@comment-27043282-20150224021209

Diamonds were removed as of the Beta 22 update. This is to coincide with the introduction of a new enchanting system to be implemented shortly. Diamond armour's removal also promotes further use of faction specific armour. You should still be able to find it in the overworld though, if you really need it.

02:12, February 24, 2015 (UTC)