Rapture and Cure Potency % Stack?

[Sotek]

As we all know that Rapture = 50-60% Cure potency now.
But Is it stack with Cure potency gear too?
Because with Rapture we hit cure potency 50% cap already.

Anyone test and prove? Example with Surya Staff +2 , Augur's Glove
for sure it's stack with Divine Seal.

No it's not. It's +50~60% to your next White Magic spell (Banish, Dia, Cure, etc.), so obviously it works outside Cure Potency.