The stone giant, H, is a monster that appears in NetHack. It is among the weakest of the giants in terms of difficulty level, but its base AC of 0 is the best among giants and second best among H (after the titan).
Stone giants may be generated in throne rooms as early as dungeon level 13, and may appear when a throne at this depth or lower is looted. Stone giants are also eligible to appear in the Valkyrie quest and Caveman quest, which have H giant humanoid as the second quest class.
Though usually considered the weakest of the giants, stone giants' low natural AC can make them troublesome to dispatch, especially if they have attack wands on hand. However, they completely lack monster magic resistance and are also the slowest among giants, which makes them much easier to handle, especially with wands and spells.
The stone giant is introduced in NetHack 3.0.0 along with all the other giants (minus the storm giant), which were differentiated from the standard giant that appeared from NetHack 1.3d to NetHack 2.3e.
Giants have always walked the earth, though they are rare in
these times. They range in size from little over nine feet
to a towering twenty feet or more. The larger ones use huge
boulders as weapons, hurling them over large distances. All
types of giants share a love for men - roasted, boiled, or
fried. Their table manners are legendary.