Also known as a Klein Field Generator, it is one of the few defensive technologies that can withstand high energy and gravitronic weaponry
An arcanotech weapon system, also known as an implosion bomb, a Schwartzchild, or a Corrosion Warhead
Pirates' many bejeweled rings and piercings actually had a practical purpose - when the pirate or sailor died, the rings could be taken off as payment for a proper burial, saving him from a watery grave. This could be tied into regional culture, or made into a quest (The Pirate's Lost Rings, etc.). Also gives treasure-seeking divers another thing to look for besides crusty old chests.