Could someone help me create a mob with various textures?

Hi, I'm working on a mod, and I was creating a mob with a mineral theme, and I wanted it to have a texture variation for each ore (diamond, iron, gold, coal, quartz, redstone, lapis lazule and emerald), as I could do that? Maybe with some procedure or it would be in the mob creation tab, I don't know, could someone help me, please!