Instruments for use in gemological laboratories, comprising photoluminescence spectroscopy apparatus interfaced with a processor for analyzing the spectral data from the spectrometer, for indicating whether gemstones are untreated or treated or for verifying the natural or synthetic origin of gemstones, and parts and fittings therefor

'analyz':16 'apparatus':10 'compris':7 'data':19 'fit':44 'gemolog':5 'gemston':26,40 'indic':24 'instrument':1 'interfac':11 'laboratori':6 'natur':35 'origin':38 'part':42 'photoluminesc':8 'processor':14 'spectral':18 'spectromet':22 'spectroscopi':9 'synthet':37 'therefor':45 'treat':30 'untreat':28 'use':3 'verifi':33 'whether':25

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