Then I grew up and my tastes changed. Now I love peridot! Not only is it a beautiful lime green color that accents my eyes but it is much more affordable than those other stones. It is one of the few stones that comes in only one color (green) and it is the only one that can be found in space! Yes, that’s right ... peridot is the gemstone grade of olivine, and olivine is the only gem that has been discovered in meteorites. So how cool is that - my birthstone is the only one that is out of this world!!