Thank you, Pear!
I've made some major breakthroughs!
1. Fusion is Fully Functioning
Once a user has two Arcane Stones fully energized, each of the same type, and one being solar and the other lunar, they can combine the two stones. They select the type of stone they're choosing from in a drop-down list (it only shows stones :D). Then they can choose from any of the stones they have that are the selected type. They select the solar, and the lunar. Once they confirm the action each stone is removed, and they receive the dragon egg!
2. Stone vs Dragon Discrimination
There are specific stats that show for dragons which are absent for stones such as name, personality, and speed/stamina/strength/sense. This is whether you click it to see the profile, or are managing it. I've also made it so that users can only select a dragon to be their familiar, not any stones.
And of course I've been working on more artwork
For dragon artwork so far I just have the egg and hatchling done, I'm taking my time to make sure it turns out how I want it to.