Ruby is a material in Total Miner Forge. It's only current use is for expensive decoration (In block form), or for tipping a diamond pickaxe to make it stronger. (Note: Ruby-tipped diamond pickaxes can not be tipped again to make Titanium Carbide-Tipped Diamond pickaxes, so be careful!). To get a gemstone, you must smelt a ruby block in a furnace. 2 gemstones are required to tip a diamond pickaxe (Note: The diamond pickaxe must not have been used before!). A ruby pickaxe is weaker than titanium picks, but stronger than diamond.