Profile: Agate Products Ltd. specializes in precision machining of ultra hard materials. We supply precision engineered parts in alumina, aluminum nitride, ferrite, glass, quartz, ruby, sapphire, silicon, silicon carbide, silicon nitride, tungsten carbide, and zirconia. Alumina oxide ceramics are available in a wide range of purities, size of crystalline structure, and various other properties. This material is used in the manufacture of tape guides for the computer industry.