New Estrella & Luna Raw Alexandrite Gemstone Earrings. Sterling Silver or 14k Gold plated Hypoallergenic posts. Handmade in the USA. June Birthstone Alexandrite is said to be an Emerald by day and a Ruby by night because of how the stone changes color depending on what type of lighting it’s under. It is a regenerative stone that helps you overcome the past and rebuild your life. This is a stone of rebirth and rebuilding yourself and your life. It will help you resolve and integrate experiences from your past so you can be your true authentic self.