Diamonds are usually a randomly generated resource in Minecraft, however, it’s quite possible to find and farm them ...
To find diamonds in Minecraft, you'll need to dig down to at least layer 15 with an iron pickaxe or better. You can see what layer you're on by opening the debug menu or by changing your settings.
GameSpot may get a commission from retail offers. We'd always recommend using Minecraft enchantments, such as Fortune, to ensure that the diamond blocks you mine give you a greater number of diamonds ...