Coordination helps with tasks like jewel crafting and alchemy*
(+3 coordination, +1 agility, +1 intelligence, +1 wisdom)
turquoise charm: +2 coordination +1 agility
moonstone charm: +1 coordination +1 intelligence +1 wisdom
If you would like more intelligence while you are cutting your gems (for absorbing training experience)
you might add a skullgem fetish (+5 intelligence, +2 wisdom, -5 stamina) before you add the moonstone charm.
*Coordination also slightly increases your attack rating and your ranged attack bonus,
but neither of these is the goal of this enchantment combination