From Google images... The clip and cross section would be silver... The back of the main piece would be drilled and the silver cross section will be glued in...
The colour could be liable to staining alright...
Was looking at the wife's bread board just now and knocking my knuckles off the back of it.. she asked what are you doing now? I replied you wouldnt believe me if I told you what I was thinking....
I've done a few pairs in woods and acrylics
using metal back plates. Turn a button to the correct size and part it off. Bond in with a bit of epoxy.
Using that method, just about any timber would be fine with a suitable finish.