Gem Identification BlueChart | Home | Features | Order | Contact | Author |
 
The main table of 18 pages is based on refractive indexes.
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   Right pages:
   All necessary information and tips are compiled to clearly identify the gem under test: Special emphasis on distinctive characteristics of treated, synthetic, and imitation gemstones. Traps are pointed out.
 
   Left pages:
   Clear reading of optical and physical data. Natural colors are reproduced. Colors are widely used to point out quickly specific features such as specific polariscope reactions, possible phenomena, doubling.