Hi all, I have this brooch and I'm sending it to DK to add 2 bails so I can wear it as a necklace. It's over 7 grams, 2.4 ct, set in silver and gold. Should I get a white gold or platinum necklace or use this yellow gold one? How heavy should my necklace be? I almost lost some pendants because I added too many on a thin chain, so I'm paranoid now. TIA!