Founded in 1971, San Jose Delta Associates Inc. is an alumina ceramics manufacturing company. It specializes in close-tolerance custom products made from different non-metallic materials, such as sapphire, Beryllium Oxide (BeO), quartz, aluminum nitride, etc. Located in Santa Clara, Calif., the firm is a government-approved fabricator of BeO and an authorized stocking distributor and fabricator for Corning MACOR, a machinable glass ceramic. San Jose Delta Associates Inc. operates a modern and fully integrated grinding department.