Alexandrite has been examined by a certified gemologist using professional equipment. you can either choose from 925 sterling silver crown (as in photo) which ships out the next business day or 14k white gold basket settings which ship out 3-7 business days. You can choose from russian pulled alexandrite which is the most expensive lab process & is the true color change of natural alexandrite & is chrysoberyl. Or from the corundum Alexandrite that is in the picture. Both Alexandrite Stones change color. These Color changing stud earrings are simply remarkable. You will love them. Wear these stunning color-changing Alexandrite Earrings when you want to turn heads. These beautiful color-changing alexandrite earrings change color from purple to fuchsia pink. The color-changing properties of alexandrite are due to trace amounts of chromium. Alexandrite is a unique form of chrysoberyl, making it one of the rarest gemstones in the world. Named Alexandrite after Tsar Alexander II, it was first discovered in 1830 in the Ural Mountains in Western Russia. Alexandrite is June’s birthstone. Alexandrite has been thought to bring luck, good fortune, & love. in Russia, it is considered to be a stone of very good omen. It is said to bring balance between the physical world & the spiritual, or astral world. It is also regarded as the gem for the 55th wedding anniversary You will love these amazing sparkling color-changing Alexandrite earrings. They will make you feel lucky & balanced. Matching Pendant Link https://www.etsy.com/listing/1039231630/real-pink-sapphire-pendant-with-halo Alexandrite stud earrings feature: Sterling silver 4mm lab alexandrite sold silver crown settings or solid 14k Earrings come wrapped in a gift box ready to be given. Please do not hesitate to contact me if you have any questions 4mm Color Changing Alexandrite Stud Earrings Silver Or Solid Gold Womens Birthday Gift Genuine Hydrothermal Studs