Can a Medusa's Gaze attack, say, petrify a Stone Giant?
For example a Fire Giant is immune from Fire, the same for Frost giants for cold etc. It seams to follow that a stone giant should have immunity from Petrification.
As a more general question what about all other 'earth' subtype creature, are they immune, the MM seams to ignore this. Where as most fire creature (etc) are immune from Fire effects (etc).