I've had a play around with some Liver of Sulphur on the surface of some silver pieces I made recently.
|This one was dipped and left until it turned black - except for the 18ct Gold details which do not oxidise.|
|This ring was quickly dipped in and out of the solution and then dipped in cold water. The colours are a nice mix of green, red & brown.|
Adding patination in this way certainly can change the whole look of a piece of silver.