Loupe Set - Dual 10x+20x, 10x, 30x, 3 Pc Field, family use, used to identify jadeite, COINS, jewelry, jade, porcelain, bronzes, stamps, antiques, etc. Magnification gems of internal features (inclusions) and external (e.g., jade acid corrosion checkered), antique calligraphy and painting appraisal good helper. Diamond grading of less essential tools for diamond studs are graded and cutters. Easy to carry, fine workmanship, feel comfortable is a pocket hd high power magnifying glass. Not suitable for reading!