This is unique optical properties. If you place the stone on top of written text it is reflected in the top of the stone, like a TV.
You will receive one high quality healing crystal from the lot shown in the photos that is 1 inch to 1 1/2 inch long and 1 inch to 1 1/4 inch wide. These are all 1/2 inch thick which is the optimal thickness for revealing the unique optical properties.
Special Note: It comes in 3 quality grades, low, medium and high. These are medium grade which do contain some inclusions as can be seen in the photos. The one higher grade above these is much more expensive with little to no difference in the actual quality of the rock. Please do not purchase if you want a perfectly clear specimen.