Sparkly birthstone cat face silver stud earrings Delicate cat birthstone stud earrings, with high quality simulated gemstones. 925 sterling silver. Double notched backs for extra security. Size: 6 x 6mm. Available in 12 Birthstone crystal colours: January: Garnet Red February: Amethyst Purple March: Aquamarine Blue April: Diamond Clear May: Emerald Green June: Alexandrite Purple July: Ruby Red August: Peridot Green September: Sapphire Blue October: Tourmaline Pink November: Citrine Yellow December: Blue Topaz