URAL MINERALOGICAL FESTIVAL, July 3 to 21, 2019, in Yekaterinburg City, Ural region, Russia
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 Post subject: Gem Identification : Pamphlet and Poster
PostPosted: Tue Apr 09, 2019 2:05 pm 
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Branko Gems/ Gemmological Research Industries Inc. (Vancouver, British Columbia, Canada)
recently released two products focused on practical gemmology. A pamphlet titled ID of Transparent Red, Pink, and Purple Gems with Portable Instruments describes how to separate natural from synthetic gem materials within this colour range using four instruments: 10× loupe, polariscope, spectroscope and the PL- Inspector/Jewellery Inspector.

And, a poster (82.5 × 40.0 cm) titled ‘Steps in Screening and ID of Lab-Grown Diamonds’ provides a convenient reference for the process of identifying synthetic diamonds using both basic and advanced instrumentation.
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 Post subject: Re: Gem Identification : Pamphlet and Poster
PostPosted: Tue Apr 09, 2019 5:01 pm 
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For those interested, from the website:
The PL-Inspector (PhotoLuminescence Inspector) allows observation of fluorescence and phosphorescence from short-wave (SW) and long-wave (LW) ultra-violet illumination. These observations can help a gemmologist determine whether a diamond or gem is synthetic or treated. The colour and intensity of the fluorescence provides a useful indicator, with a common test being whether the SW intensity is brighter than the LW, thereby suggestive of a synthetic diamond.

The PL-Inspector has an inspection viewing area of 15 x 15 mm. (For parcels of stones or jewellery pieces, the Jewellery Inspector provides a 50 x 50 mm viewing area.)


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