The term 'ORE TESTER' can be summarized as an ASSAYER, which is a seven-letter job title. An ASSAYER is a professional who tests and analyzes ore samples to determine their composition and quality. They use a variety of methods, such as spectroscopy, X-ray fluorescence, and chemical analysis, to identify the elements present in the ore and measure their concentrations. Assayers also use their knowledge of metallurgy to determine the best way to process the ore for maximum efficiency.