You can have different birthstone for this ring.Please leave us a message about the stone you like,you can leave us like Dec/Oct.This ring is ordered to make and may need around 2-3 weeks for production. The stone are all simulated color cz stone not nature gemstone. The color will. be Jan.Garnet Red Feb.Purple Mar.Light Blue Apr.White May.Deep Green Jun.Simulated Moonstone Jul.Ruby Red Aug.Peridot Green Sep.Deep Blue Oct.Pink Nov.Yellow Dec.Tanzanite Blue