Stealth ore is a metal that is completely invisible to any electrical equipment except for a slight shimmer. It seems it can be turned off, as in Artemis Fowl: The Opal Deception. A box plated in stealth ore becomes visible for a single frame when the camouflage signal is turned off. It was originally going to be used for space craft but is extremely expensive, as a small box worth of stealth ore cost a large warehouse full of gold. It covers Opal Koboi's Stealth Shuttle in the fourth book of the series, making the vehicle's hull worth over fourty large warehouses of twenty-four karat gold.