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Gemstones Identification-Blue Chart Ed. 2022
Gemstones Identification Chart by Nicolas Lazzarelli Ed. 2017
12 Tabelle complete di indici, spettri e caratteri distintivi delle pietre più comuni
Gem Identification Bluechart 2017
A compilation of key information for the gemologist:
- to analyze the results obtained with all the standard gemological tools
- to distinguish between natural and treated gemstones, synthesis and imitations
- to avoid traps and potentially misleading results
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