Can I combine base metal with precious metals?

Generally speaking, our artists and designers do not mix base metal and precious metal.  There is just something about mixing expensive metals with inexpensive metals that our meticulous personalities just don't usually go for around here! 

However, sometimes mixing metal types cannot be avoided.  For example, if you'd like to use red jump rings in a sterling silver piece, you must use anodized aluminum or enameled copper, as niobium and titanium do not come in red.

Mixing and matching is completely up to you if you want to.  If you enjoy the aesthetic or you feel your project calls for it - go for it!  Making chainmaille jewelry is all about being creative.  There are no rules.  If it works, and you love it, it's right.