CC clarifies enough that the Red Rock is indeed the Frozen Flame.
Dreamstone and the Red Rock of 3,000,000BC are not the same.
We do not have enough evidence to state that the Red Rock is similar, or even a counter to the Frozen Flame. All we know is that it is a mineral that can absorb energy. Anything else is speculation, and don't simply assume that because the Masamune channels spiritual energy means that the Dreamstone is doing it. Remember, Masa and Mune are imbeded in that sword, they're most likely doing that job. Same thing with the Mammon Machine. It was made out of Dreamstone in order to absorb the energy, and designed to release and amplify it out, which doesn't have to be a quality of Dreamstone at all.