Chrysoprase is a beautiful green microcrystalline quartz variety. The green arises from a small amount of Nickel. I think it's the combination of millions of tiny quartz crystals and that healing green that makes this stone such a potent powerhouse of energy ! The cleansing green fire of Chrysoprase connects Heart to Crown making it an all round healing and inspiring energy. Good quality Apple Green Chrysoprase with consistent colour has become more rare and expensive. It's similarity to the most expensive Imperial Jadeite has also led to it's nickname "Australian Jade" since this country is the prime producer.