Gemstones Identification-Blue Chart Ed. 2023

12 Bestimmungstabellen  mit Werten der Brechungsindizes und Spektren, an die sich in erster Linie die entscheidenden Charakteristika anschliessen. 

Gem Identification Bluechart 2023

A compilation of key information for gemologists:

- 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