I have cast jewelry sized items using bronze - Rio Grande carries
about 4-5 different types of bronze casting grain. My favorite is
"Ancient Bronze" which is Rio Grande product # 706-051 at $8.75 per
pound (no zinc in this bronze), melts at 1850-1905 F. It also plates
easily, and takes a good patina.
They also carry nickel silver, but that melts higher (2400-2500 F).
This infor is from Rio Grande Tools Catalog 2006-2007.
Jon Steel, Sculptor