Unless otherwise specified, products manufactured by GIA Instruments, are warrantied to the original owner to be free of defects in materials and workmanship for one (1) year from date of purchase. Products offered by GIA Instruments, but manufactured by other companies are not covered under the warranty; however, may be separately warrantied by the manufacturer. Consumable components such as lamps, tubes, filters, liquids, and batteries have a thirty (30) day warranty.