Anvils guide to Crystals

Please note that if I make crystals either armour or weapons these requirements apply.
You can swap them over it's a move action to remove or add one during combat turns.
All weapons or armour made solely by Anvil have a special place to slot a crystal into.

To use a least augment crystal it must be attached to an object of at least masterwork quality, even if the object itself has no magical properties.

To use a lesser augment crystal it must be attached to an object with a magical enhancement bonus of +1 or higher.

To use a greater augment crystal it must be attached to an object with a magical enhancement bonus of +3 or higher.
Only the item’s actual bonus applies, not its “effective” bonus for example, a +1 keen holy flaming burst longsword won’t allow a greater augment crystal to function, since its actual bonus is only +1.