A rare, superheavy metal first depicted (but not named) as a quartzite-like "mineral" in the original Stargate movie. Its most basic use is as a weapon: Naqahdah greatly amplifies energy, making it extremely potent if paired with explosives. Due to its unique properties, naqahdah forms the basis for many advanced technologies; the Stargates themselves are composed almost entirely of naqahdah. Naqadah is also present in the bloodstream of the Goa'uld, which allows them to control their technology and sense the presence of other symbiotes. The Goa'uld have naqahdah mining operations on many planets; its refined form, weapons-grade naqahdah, is extremely valuable and often used as currency. Weapons-grade naqahdah is so dense that two Jaffa are required to lift a quantity the size of a couple of common housing bricks. Alternate forms of naqahdah include liquid naqahdah, used to power Goa'uld staff weapons,]and heavy liquid naqahdah, used to power Goa'uld AG-3 weapons satellites. Naqadah is a superconductor. Naqadah does not occur naturally in the Solar System.