Marble / Black Marble

I think that adding Marble and Black marble to the game would be a good idea, especially with the new caves and cliffs update. I have some suggestions for how to implement these as well. Marble can be created by smelting diorite, which will give you raw marble. Craft 4 raw marbles into a polished marble, Pillars, slabs, and stairs can be implemented from there. For black marble, I think that it should replace andesite at lower y levels, similar to how stone is replaced by grimstone. Mining gives you raw marble, same recipes as above. You can make cracked marble as well by smelting it again.

Also, this is just an additional idea, which is red marble. You can craft it by either smelting Granite, or dying marble red. However, it is hard to dye stone, so you'd need to have 2 red dye and one raw marble block to dye it