@Shiny FurretNickeline will depend on Kronshi so you would have to ask him. I did not know they had the other colors so that is more acceptable
Opalite is going to be hard for fusions. It is also very close to Moonstone which will be a fusion since it is in the making.
No Agates. Kronshi refuses to do those.
Flint is close to black. If you know of a different color than maybe but all black gems are banned since most of them are used. They just aren't up because the person is gone and the other black gems fusions are for Zircon.
Kona Dolomite is also an acceptable one