People don't always mean the same thing when they say cured or cycled.
Often, cured means letting nasty dead rock full of organics stew until all the crud has broken down. That will usually have the effect of cycling the rock as well.
Others will cure pristine, store-bought dry rock just to be on the safe side or bc they worry about phosphate. If no ammonia source was added during the process, rock like that would probably still have to be cycled, or certainly tested, as brandon says.