pawnshop worker determines the ring of gold jewelry using the hydrostatic weighing method by archimedes' law

gold jewellery pawnshop pawn shop ring verify hydrostatic weighing method check water authenticity density identity magnifying glass fake popshop lambard jeweller business gem euro money jewelry examining scales precious quality buy control jewel lens repair silver store inspecting looking client luxury occupation sale sell holding hand closeup stone carat worker determines using archimedes#39aph39# law evaluation items concept