gemology table Spectroscope built-in digital scale: range from 400 to 700nm 12V/50W highly spotlight halogen lamp cup light table gemology spectroscope Desk type, dual light, light source adjustable12V/50W superior performance and highly spotlight cold light type halogen lamp cup, high shiny efficiency; meanwhile, minimize the roast level to the fiber tube.Adjustable input light hole: 2-28mm600mm ...