This is a magnificent large Self-Healed Altar Quartz Crystal. It has beautiful rainbows throughout. It has great transparency, much better than shown in the photos. You can easily see inside every inch of this crystal. The crystal faces and two of the sides have been lightly polished. There is some natural castling along two sides of the crystal shaft. At the base of these two natural sides, there is a large area of self healing. As you can see in the photos, there is a large penetrator crystal attached near the termination that has both ends broken off. On top of that sets another smaller crystal. The base of this large penetrator crystal is completely self healed. The amount of self healing in this Altar crystal makes it truly unique! That combined with the rainbows and the sheer size of this giant makes for a powerful healer. A very rare find!