 An example would be "a white horse proper", since without breaking the rule of no metal on metal it could be placed on a field Or (gold), but "a horse argent" (silver horse), although visually indistinguishable, could not.Furs and charges blazoned as proper can be placed on colour, metal, fur, or charges blazoned as proper.Simple divisions of the field are considered to be "beside" each other, not one on top of the other; so the rule of tincture does not apply.