Profile: International Crystal Manufacturing Company, Inc. provides crystals, oscillators and filters. We are an ISO 9001:2000 certified company. Our quartz crystals, oscillators, filters, and TCXOs / VCTCXOs are used in military applications, communications, microwave transmission, data acquisition and transmission. Our crystal and frequency control products include crystal, precision crystals, quartz micro balance, and monolithic crystal filters. Quartz crystals are thin slices of quartz placed between two electrodes, housed in a hermetically sealed package that provides a means of connection to a circuit.