Where the Alchemy Clear, Silver to Gold contacts the silver, the effect may be extremely subtle. This is because the iridescent coating is shielding or buffering most of the surface from actually contacting the silver. The only contact is in the tiny crackles in the iridescent surface which result from the sheet being stretched while hot in the factory. (We do this to give the iridescent surface less shine, and more of a satiny sheen.)
So, where the irid coating touches the silver, the silver will remain its original color. Where it contacts the glass, there will be little crackles of gold color, but they may be so small you can't see them very well without a loupe.
To give you an idea of the potential pattern, shown with much higher contrast, here are some tests showing copper glass fired against Reactive Clear, with an iridescent coating as a buffer. http://bit.ly/2eaPoiM
Does this make sense?