A word regarding Soviet silver, looking like and be described as niello.
This "niello" is not niello, it is a chemical oxydation, looking at the first glance like niello. All the fake niello silver is made like that today, only the contures of the sujet are engraved. So be careful!
Real niello is completly engraved and the lost silver material is filled up with a special substance, after it gets polished.
Hope that helps

.

