The jeweler I'm buying from doesn't not have return policy (only a store credit). I want to get an appraisal beforehand, but don't know if it's possible without having to buy the stone (still negotiating). If I do get an appraisal, where in LA can I get a good appraisal that includes a Brilliancescope reading? Is a Brilliancescope reading really necessary? Is an appraisal necessary if the specs. for proportion are good? The diamond looks brilliant and has a lot of fire. Help!!!