Water Opal
Water opal is a clear, translucent variety
of opal with only a play of color to it, like oil on a clear
puddle. Water opals are rare and valuable gems used as ornaments
around mirrors and windows or in the crafting of
magical scrying devices (such as crystal balls).
A water opal included in any wand with a divination
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.
Material Cost: 1,000 gp.