New Charming 18k Gold Filled Tulip Charm Necklace. A great addition for any day especially nice for a gift Birthdays, Friendship, Mother's Day etc Metal: 18k Gold Filled 1.2mm Rolo chain Size: 15 inches with 2 inches extender chain Weight: 1.2 grams Hypoallergenic jewelry - Nickel Free Water resistant Rigorously manufactured under CA Prop 65 and EU standards Will your necklace tarnish? No. If for any reason, any 18k gold filled tarnishs to black or green color it is because IT IS NOT GOLD FILLED. Simple like that. Is this necklace hypoallergenic? Yes, this necklace is hypoallergenic, which means, manufactured under strict health guidance regulations. I have complied with CA prop 65 and EU regulations.