Most collectors think a Akro Carnelian should glow under black light. If Cairo it may glow or not glow. I am sure it is Cairo. Most if not all Akro Carnelian's contain white. Some people call the orange oxblood a Carnelian. Most of those do not contain white and most do not glow. So many do not consider those orange and oxblood as Carnelians. Here is link to a box or Akro Carnelian's. Easier than taking pictures of my box. I do not think your marble looks like these in the box. We all would like our marble to be some better than most actually are. But, it is what it is. It is your marble, you may place it or label it what ever you like. Just my opinion, is for Cairo.