Gem Identification Blue Chart 2022 Edition

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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.


Brand Lazzarelli
Shipping Weight 0.2200kg
Shipping Width 0.320m
Shipping Height 0.020m
Shipping Length 0.260m
Shipping Cubic 0.001664000m3
Unit Of Measure ea

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