... are especially designed to optimize the viewing of gem stones and jewelery. They include features such as dark-field ... good variety of types for choose, such as:Gem Microscope,Gem Refarctometer,Gem Lab Kit,Spectroscope, Polariscope,Jewelry Magnifier,Diamond Grading ... Lamp,UV Box,Jewelry Cleaner,Hardness pencil,Presidium Tester,Gem torch,Diamond viewer,Diamond tweezers and other instrument accessories ...