handheld jewelry identification microscope magnifier 21mm 10x21mm 20x21mm 30x21mm silver metal magnifying glass loupe antique appreciation

- professional grade products with gb 1 grade optical glass - full metal construction with silver chrome finish - comes with a portable storage box - small size, beautiful workmanship, easy to carry [the main purpose] 1. zoom in to observe the internal features (inclusions) and external features of the gemstone (such as the acid-etched netting of the jadeite b); 2. indispensable tools for diamond grading, used for diamond grading and cut evaluation; 3, because of its small size and easy to carry, it is widely used in the jewelry industry.