This Dioptase is from Africa. Its formula is Cu6Si6O18·6H2O (also reported as CuSiO2(OH)2). It has a hardness of 5, the same as tooth enamel.Dioptase is a wonderful crystal for elevating your Higher Heart Chakra and for encouraging compassion and forgiveness. Dioptase is ideal for healing Past Life Karma. It also assists in reminding you to be grateful for all he abundance around you in this life. The vibration it holds may help you live in the moment while, at the same time, activating past life memories. This crystal is ideal to meditate with. Thus, helping you move past these Karmic links which are potentially holding you back. Heal your inner child and unstick yourself with Dioptase.