BetterThanDiamond.com AnswerBase

We combine either ruthenium or iridium with platinum to make our platinum for our jewelry. The typical percentage is 95% platinum, 5% ruthenium.

We *never* use cobalt to create our platinum, as cobalt tends to oxidize very quickly and produce darker, duller platinum.

Both ruthenium and iridium produce platinum with exceptional luster and shine.