The Underwater Prospecting Tool is a handheld waterproof device designed to detect metals, specifically gold, in underwater environments. The project, initially proposed by a hobby diver and prospector, was to increase sensitivity to specific materials, namely gold, and decrease cost of such a device. Utilizing a 'Double-D' VLF coil design, the detector generates a magnetic field, which inductive materials such as copper and gold will in turn generate to this external field. This causes a feedback towards a receiver coil that disrupts the balance between the receiver and transmission coils giving a response. Power is supplied from a 9v battery which is distributed into five volt and 3.3 volt rails to power an ESP32 micro-controller and signal generator. The micro-controller provides signal processing, signalling to the user notification motor, and timing for the 15kHz transmission signal. In order to sustain a constant magnetic field in an underwater scenario, required specialty design and extra supports included for user safety and continuous operation. When provided with an inductive material in an underwater scenario the detector reliably provides a physical signal to the user.