Unique stone. PIETERSITE - You may notice that when you first use it that you can feel it working on removing blockages, yet at the same time you may quickly find that you experience a state of altered awareness. Its energy encourages you to look further, into the distance, well beyond where you are now, to see the big picture, and will stimulate determination and courage within you, to aid you to take the steps required to get there! 925 sterling silver but not stamped. Wish I had this in my size.