Hello. I want to know the shipping cost and if in the minimum order of 30 pieces, I can mix different colors, or do they need to be all the same?Product: 5A cubic zirconia pave crystal diamond necklace double circle set SIZE: Pendant 0.35cm*1.2cm Plating: Gold/Rose Gold/Rhodium/Gun Finishing: PolishThank youJennifer Zavalla-Abraham Show More