Insten 2 pack Pocket Size Magnifier Jewel Loupe with 30X Magnification For Fine Art Inspection, Sapphire, Stone, Diamond, Gems, Ruby, Emerald, Pearl, Jade, Crystal, China This extremely powerful Jeweler's Loupe is 3 times more powerful than the average (10X) loupe It comes with its own hard plastic felt lined storage case It include a small loop to attach to a neck chain or key chain Lenses are glass, not plastic