The GECI laboratory was launched with the aim of offering complete reliability and professionalism in the field of identification and grading of diamonds, colored gemstones and pearls.
The GECI laboratory is an independent and impartial entity and so are the evaluations expressed in the Reports; evaluations made strictly in line with the global gemological standards (International Diamond Grading System ®) and in compliance with national and international regulations.
Every GECI Report, statement of the identity and quality of a gemstone, is written in English and includes identification and safety codes, which make it unique and impossible to imitate.
The GECI laboratory is equipped with the highest level of gemological instruments managed and coordinated by a LIMS software (Laboratory Information Management System), which enables the integrated management of multiple types of data and processes. All the services offered by the GECI laboratory are aimed at both individuals and businesses alike, always in full respect of privacy.
GECI is the European alternative fully equipped to support your needs for the identification of any size and shape of synthetic diamond.


This is the main tool of the gemologist. It allows you to make observations in different kinds of light (dark field, bright field and reflected light), to recognize certain features and/or treatments and to distinguish between the different species and between natural and synthetic stones.

Immersion Microscope

A microscope equipped with an immersion cell (for immersion of the sample in a specific liquid), which minimizes the effects of refraction and reflection, normally present in faceted gems.

Masterstone Set

A set of comparison stones in diamond and glass/plastic, used to determine the color of diamonds and to compare to other gemstones.


An optical system equipped with cameras and managed by a computerized system where a precise and accurate measurement of the stone’s profile can be performed. In fact, it generates a digital three-dimensional geometric model of the gem allowing the evaluation of how each parameter of the gem’s proportions affects the final grade of the cut.


The DiaScribe is a modern tool consisting of a laser that allows the user to engrave the desired text on the diamond’s girdle with the least possible penetration, and view the inscription under magnification.

FTIR – Fourier transform infrared spectroscopy

The FTIR spectroscopy is a widely-used analytical technique and is one of the main instruments in the gemological laboratories. The spectroscope breaks-up light and produces the characteristic absorption spectrum of the sample
The GECI laboratory owns Perkin Elmer’s cutting edge Frontier Optica FTIR spectrometer furnished with a Diffused Reflectance Sphere and Beam Condenser.

Micro-Raman Spectroscopy

The Micro-Raman spectroscopy is a modern, non-destructive analytical technique that allows the analysis of the mineral phase in question (inclusions).
The GECI laboratory has a confocal Raman microspectroscope inVia – Renishaw, with exciter source at 514nm for μ-Raman and Photoluminescence (PL) for gemological applications. This instrument, coupled to a Leica DM2500 optical microscope, focuses the beam on a specific area of the sample analyzed.

UV-Vis/NIR Spectroscopy

The UV-Vis/NIR (Lambda 950; Perkin Elmer) spectroscope reveals all the possible treatments (especially the superficial ones) that the gemstones (including pearls) may have undergone.

Spectrophotometry ED-XRF

The ED-XRF spectrophotometry is a non-destructive technique allowing the chemical analysis of the samples.
The GECI laboratory possesses a ARL Quantx EDXRF – Thermo Scientific Spectrophotometer that helps identify the origin of a pearl (saltwater/freshwater).

Diamond View

This is an imaging instrument suitable for observing a diamond’s fluorescence under an ultraviolet source at high magnification. It finds its best application in the distinction between synthetic diamonds and natural ones, thanks to the observation of different characteristic growth patterns. The GECI laboratory has the latest model of Diamond View produced by the De Beers Group, which allows the analyst to observe both loose diamonds and mounted ones of up to 10.00 ct. Thanks to its versatility, it can also be used to capture images of other gems that present characteristic fluorescence patterns and for the pearl analyses, i.e. to detect color treatment.


-A Refractometer is an instrument which measures the refractive index (single/double refraction and birefringence) of the material.
-A Polariscope is an instrument used to analyse the optical character of a gem.
-A Dicroscope is an instrument used to examine the plechroism of the gems.
-A UV Wood’s Lamp with which the fluorescence of the gems is observed.
-Northern Light Lamps create the perfect environment for gemstone color grading.
-A Spectroscope is an instrument used to analyse the absorption spectra of the gems.
-A Hydrostatic balance is used to accurately measure the weight and specific gravity of the gems.

The GECI laboratory is constantly evolving, always adding new and modern tools that are and will be introduced as the standard gemological analysis of every day.

The GECI laboratory is constantly evolving, always adding new and modern tools that are and will be introduced in the standard gemological analysis of every day.

The GECI Gemological Laboratory is equipped with a state-of-the-art LIMS (Laboratory Information Management System), that allows it to operate on each sample and/or gem with the highest level of efficiency, effectiveness and quality. The LIMS is fully integrated with all the instruments in use in the laboratory, from spectrophotometers to the scales and electronic ProportionScopes. As a result, the GECI laboratory is known to have an extremely advanced level of technology, establishing itself as the first gemological laboratory in Europe to own a management software of such sophistication.


Lab Catalog

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Price List

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