Hypoallergenic,Nickel Free and Allery Free,Especially High Quality Ear Stub for Sensitive Ear High quailty zirconia diamond stone, imported, sparkle & shiny December-Turquoise, blue topaz and tanzanite represent a happy life that is filled with good fortune. Headaches may be relieved or prevented. Ancient practitioners believed that turquoise would actually change color when the wearer was ill or in danger. Come with free gift box & sterling silver pushbacks, allery free 90-Day Money Back Guarantee or Exchange