Sapphire Crystal for Boccia ID only. The Sapphire crystal is an upgrade from the mineral crystal that normally comes on your Boccia id. watch. Sapphire crystals are scratch-resistant.Please note, you must send your Boccia id. watch to us if you already own one and would like to upgrade to a sapphire crystal. We will not ship the crystals out separately.Important: Once you have upgraded your watch to a Sapphire crystal, that watch cannot be returned!