Let it go, let it go ... actually - I loved the movie and the endless references to it don't bother me at all.
This is CiM's Frozen, and it is a translucent white, denser than Cirrus.
Here, you can see it next to a rod of Cirrus (on the left)
Presented by itself, as a white spacer, it is just a little off white. It is a well-behaved glass, and not shocky, so if you have been attempting to use Effetre's Anice White and the shockiness of it is making you insane, try this. I haven't tested the reactive properties of it, (compared to Anice) - but I can tell you - the latest batch of Anice I have had access to is pretty much unworkable. I know people who are actually throwing it out.
Here we have a tube bead, black core, left side is encased with Cirrus, and right side is encased with Frozen. The Frozen is substantially denser, and would need to go down in a much thinner layer to get the same effect.