By concentrating ultrasonic energy through a machines, tapered solid metal horn to a stainless steel tube (drill) which vibrates, in an abrasive medium, the ultrasonic drill penetrates hard materials with extraordinary ease and rapidity. For example by using as 1mm tube, it will drill through a piece of agate 5mm thick in approximately one minute. All types of gemstone material may be drilled with the Model USD as well as glass and ceramic materials. The USD minimizes the concern one experiences drilling fragile and precious material. The machine consists of two components, the amplifier which generates the power for drilling and a transducer head which converts electrical into mechanical energy. The workpiece is hand held without harm to the operator.