SRD:Protection from Spells

The subject gains a +8 resistance bonus on saving throws against spells and spell-like abilities (but not against supernatural and extraordinary abilities).

Material Component: A diamond of at least 500 gp value, which must be crushed and sprinkled over the targets.

Focus: One 1,000 gp diamond per creature to be granted the protection. Each subject must carry one such gem for the duration of the spell. If a subject loses the gem, the spell ceases to affect him.