Gem Identification BlueChart | Home | Features | Order | Lab reports & links | Contact | Author |
Table 1:   Gemstones listed by refractive index (18 pages)
 << Back Next >> 
                  Left pages:
                  Clear reading of optical and physical data.
                  Visual help to point out quickly characteristic features.
                  Natural colors are reproduced.
   Right pages:
   Key information: to identify the gem as natural, synthetic or imitation;
                               to recognize possible treatments;
                               to prevent misidentification (overlapping values).