The 'patina' series features organic leaf shapes finished with a characteristic patina. Not a defect but want to highlight the hand crafted nature of these items and the surface patina that is completely intentional and quite a rustic finish. The blue version for instance has hand applied enamels over copper which is fired to create the end effect, each one is very slightly different in terms of how the enamel has spread and pooled, some are lighter in colour whilst some darker. If you have a preference please ask.