I have seen a while ago a picture of a brooch that was constructed from a gradient color alloy, white-yellow.
The ideea stuck to my mind and recently I have started to research this kind of alloy, but no luck.
I have found pieces by Gio Carbone, Adam Neeley and Niessing, made in alloys that have gradient colors, but there is no information on where to start learning about them, or just a pointer in the right direction for further experiments.
Does anyone have any ideea what is the path to follow to eventually reach such an alloy?
I am not asking for recipies, full info or anything like that. I know that the people who made them have spent a lot of time doing expensive experiments, so i am not asking for a tutorial, or something like that. Just ideas, so I can have a starting point in my research.