No.. cocaine can be rerocked using ether/ or hexane/C6H14. What happens is the cocaine dissolves, the ether/ hexane evaporates, and the paste turns back to a solid.. when it crumbles it will be no different in quality btw.. same ol coke you started with, now with hydrocarbon radicals.
I believe cocaine has its uses, but should be avoided as a long term recreational drug.. I put some crack in joint last night, not sure the quality of its base cause someone gave it to me, I recooked it in water though and didnt change much the mass.. was tasty.. I had a bit of water in the ear and that joint popped it right out.. doubt Ill bother doing it again for least another month or more..