Diamond

Diamond is the most valuable Gemstone in the game so far. It would be made by Gemcutting with an Uncut Diamond, but this item is unobtainable. It can be used for crafting Diamond Tools. It has a value of 1500 in Trading with the Neanderthals, and can only be obtained by trading. It can be re-used in gemcutting to make Diamond Axehead, Diamond Pickaxehead, Diamond Hammerhead and Diamond Blade.