Opal

Opaque, smooth gems, opals are pale blue with

green and gold mottling. They are related in type to fire

and black opals, but are only slightly more common. Opals

are used in a number of magic items and spells, including

An opal included in any wand with an enchantment

(charm) spell increases the save DC against the wand’s

effect by +1. If no saving throw applies or is allowed, it instead

adds +1 to the effective caster level of the effect.