L^: mu4	-	R#: Touch	-	D^: Special
C^: v.s.m	-	CT: 1s	-	S^: None
A^: One creature	-		-	-

Effect: When this spell is CAST,
the affected creature gains a virtual immunity to any attack by cut, blow, projectile, or the like.

Thus, even a sword of sharpness would not affect a creature protected by stoneskin, nor would a rock hurled by a giant, a snake's strike, etc.
However, magic attacks from such spells as fireball, magic missile, lightning bolt, and so forth would have normal effect.
Any attack or attack sequence from a single opponent displs the dweomer, although it makes the creature immune to that single attack or attack sequence.
Attacks with relatively soft weapons, such as a monk's hands, an ogrillon's fist, etc, will inflict 1-2 points of damage on the attacker for each such attack while the attacked creature is protected by the stoneskin spell, but will not dispel the dweomer.

MC: granite and diamond dust sprinkled on the recipient's skin.
 

WSG: A character who takes a tumble while this spell is in
effect upon him will suffer no abrasion damage as a result of the
episode, but the act of tumbling will dispel the magic, whether or
not the recipient would otherwise have suffered damage. The
magic will also keep a character safe from injury in a hailstorm
(the entire storm being considered as an “attack sequence’), but
it will be dispelled when the hailstorm stops.