Rick, thank you so much for your on the tumbaga alloys.
It has piqued my interest!
I never paid much attention to pre-Columbian gold before (I know,
shame on me), but after reading your post about the casting method,
I just have to get some of the books you listed! (I love ancient
metalworking techniques, and this will dove-tail nicely with the
European methods I am more familiar with.)
–Terri