Some suggestions for Lapis Caelestis localization

[Vexatos]

How about Lapis Caelestis Cinereus Lucidus instead of Lapis Caelestis Lux Cinereus? Would be grammatically more correct.

And Lapis Caelestis Caesius would be better than Caesicius since Caesicius actually has a completely different meaning (Means 'tightly woven' if I recall correctly).

Alternatively to Cinereus you could use Canus, but that's your own decision.

Alternatively to "Lapis Caelestis Nox" you could use "Lapis Caelestis Ater" to be consistent with colour names.

The rest looks fine to me.

[rwtema]

I'll think about it when I have some time.

I think Nox is fine since night is strongly associated with black and a lot of people are aware of its latin meaning (I used it since I didn't want to use the more accurate but potentially offensive Niger).

[Vexatos]

Well, I don't think that "Ater" as a phrase for Black would offend anyone, actually.