|margaret solow makes these wonderful kids zen gems just for nonchalant mom. each lovely, clearly smooth zen gem necklace is chosen by margaret by hand, she meticulously strings them on a nylon cord (otherwise the gem will cut through the string) that is colored to match the gem. these sweet necklaces make perfect special occasion gifts...or just an everyday favorite, I even think they are great for boys, Sander loves his and takes it off each night and hangs it by his bed....I love that! green is prenite, purple is amethyst, blue is aquamarine, and pink is rose quartz. the kids zen gem is strung on a 15" cord. but you should take them off your kids at night.