It's not that multi-colored rainbow sapphire jewelry is new to Matilde Parente's Libertine boutique shop in Indian Wells - she's carried the designs for two years. OAS_AD('ArticleFlex_1'); But when the California Supreme Court delivered its landmark ruling in May allowing same-sex marriage, Parente had an epiphany: Why not market the colorful jewelry to gay couples planning to wed?"I wanted to get some more of the styles that might be more popular," Parente said, referring to the desert as "same-sex marriage capital, USA."She's one of several Coachella Valley jewelers looking to capitalize on the new same-sex marriage ruling.So, Parente doubled her ...