O.O. (OldOres) Is a Resource Pack that changes the ore textures to the old textures including the deepslate ores too. For copper and nether gold it uses a custom texture to fit the old vanilla textures.

Nether gold and quartz use the old netherrack texture. This Resource Pack is more cool paired with Programmer Art Resource Pack.

Why use O.O. instead of other Resource Packs? O.O. makes the copper and nether gold look old too, quartz is also it's old texture.