Material1, Crystal2, Platinum Plated alloy3, Cubic Zirconia Great Gift Ideal For:Anniversary /Birthday/Date /Graduation /Romantic Surprises Valentine’s DayThanksgivingDayChristmasMother's DayNew YearMaintenance Instruction a. Take it off when you go to sleep.b. Keep it dry and free from sweat.c. Do not touch it often, grease and sweat on hands will caused corrosion.d. Put it inside a soft cloth pocket or fabric swab, avoid it from rubbing against other jewelry.