Gem Identification Blue Chart 2022 Edition

The Blue Chart 2022 Edition

Tables of Gemstone Identification (For faceted stones, not opal)

A must for gemmolgists, gemmology students or amatuers to aid in the correct identification of gemstones.

The BlueChart is A4 size, printed on card stock (220gr per m3). It has a total of 15 pages with ring binding. (Not laminated).

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

Gemstones listed by refractive index

- Clear reading of optical and physical data.

- Visual help to point out quickly characteristic features.

- Natural colors are reproduced.

Key information:

- to identify the gem as natural, synthetic or imitation;

- to recognize possible treatments;

- to prevent misidentification (overlapping values).

Gemstones listed by density.

Density followed by optical data make possible a basic identification of most gemstones

Key information from the other tables will confirm and specify the identification when necessary.

Dichroscope analytical results for gemstones

- Anisotropic stones are listed by colors

- Characteristic pleochroism is described.

Diffraction Spectroscope Analytical Results

Three pages containing the diagnostic and relevant spectrums seen with a handheld diffraction grating spectroscope. Results shown for 82 different gemstones.