Marblesmith

nice looking white blocks

Marblesmith adds marble that generates in your world. You can use it to make nice looking builds. It looks more aesthetically pleasing than diorite. These blocks can be crafted using crafting tables, stonecutters, or whatever modded auto-crafters and cutters you have.

Compat with Stone Zone! Every Compat (Stone Zone) - Minecraft Mods - CurseForge