The black opal gemstone was many years believed to possess superstitious powers because of its ability to emanate each color of every gemstone available. This untreated gemstone can be used to make rings or pendants or for whatever jewelry you might prefer it for but it will leave a lasting impression on whoever sets eyes upon it. With 4.23 carats available to this and comes in an oval shape, it is really an item worth having. It has many colors and is normally mined in Australia where it acquired many superstitious beliefs but overal it is a rare gemstone to have.