Chelsea Filter(Jadeite Filter), Jewelers Hastings Triplet Loupe, Diffraction Spectroscope - Gem Identification Tools Bundle - 3 items Identify about 85% of all precious gemstones with this kit. Compare to GIA's $200 retail value. 10x triplet jewelers loupe in black housing - The spectroscope is used to analyze light passing through a stone. Chelsea Filter - now used to identify mostly any gemstone