Amulet of Defense

A yellow rounded gem smooth to touch with a warm centre. The gem has a rough circumference of 5cm and is firmly embedded into a black steel bracelet. 

Notes: Bonus: Armor Class, Speaking the command word as an action to initiate the shield as an invisible force field from the gem. Dismissing the force field requires speaking the command word as an action. You can also dismiss the shield as a bonus action with a failure rate. 1D20 between 1-10 then gem recharges for 1 minute, Takes 30 minutes to attune to the item in which time the bracelet will resize to the wrist and gem will begin to glow