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| Copyright © - All rights reserved |
| GEM
TESTING LABORATORY |
| THE VERY FIRST GEM TESTING LABORATORY IN INDIA : | |
GII was established in the year 1971 by the Gem & Jewellery Exporters Association. GII 's Gem Testing Laboratory is a service organisation working for the benefit of the Indian Gem industry. The Gem testing laboratory is a turning point in the history of Indian gem industry towards the scientific development in the field of Gemmology in India. The laboratory is supported by the industry, and hence the testing fees are at a very subsidized level. |
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| IMPARTIAL AND INDEPENDENT LABORATORY : | |
Gem Testing Laboratory is the backbone of the Gem Industry in India. The Laboratory is also open to the General Public. Gem testing laboratory of the GII extends its services, whenever required, to the Customs department of the Government of India for identifying gemstones in the course of imports and exports. The gem testing facilities are also availed by other departments like income tax, police etc. India's premier, impartial and independent gem testing laboratory is located in the heart of the Gemstone market in Bombay i.e. Zaveri Bazar.More than 50,000 gemstones have been certified till date. |
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| INTERNATIONAL RECOGNIZATION : | |
Gem Testing Laboratory is recognized by the CIBJO, the appex trade organization of the Gem Trade and Industry in the world. GII's Gem Testing Certificates are of international standard and are valid all over the world. |
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| ENCOURAGING THE EXPORT GROWTH : | |
GII's Laboratory is serving the Industry by certifying gemstones in the course of exports and imports, when ever required. It safe guards the credibility of Indian gem industry, which in turn helps the growth of exports from the country. Eversince the science of gemstone started developing in India, the exports also started booming. Gemmological education indirectly gave a fillip to the export growth of gemstone from the country. |
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| RESEARCH
LABORATORY |
| NEED FOR R & D | |
Research and development is the fundamental for the growth of any industry Keeping this vital aspect in mind and understanding the requirements and the needs of the Indian gem industry, GII started the Research and Developmental activities as early as in 1976. the research team of the institute engaged in various developmental programmes covering applied and pure science, study gemstone and their properties, with a view to improve the quality of gemstones exported from the country. |
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| SIRO / RECOGNIZATION | |
In the year 1979, GII
has obtained the recognization as an R & D Laboratory by the Department
of Science and Technology, Government of India. |
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|
A GLANCE at GII LABORATORY : |
| THREATS TO THE GEM & JEWELLERY INDUSTRY | |
The threats to the Gem & Jewellery Industry are : |
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HPHT- HIGH PRESSURE HIGH TEMPERATURE |
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| SYNTHETIC
& TREATED |
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| Diamonds and Gemstones | |
| “Unless HPHT & Synthetic Diamonds and Gemstones are identified, they are a big threat to The Gem & Jewellery Industry.” | |
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|
| At GII , we identify | |
| HPHT
|
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| TREATED
/ ENHANCED |
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| SYNTHETIC |
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| Diamonds as well as Gemstones, with the help of Qualified Expertise and State-Of-The-Art Equipments. | |
At
GII’s laboratory, many advanced scientific methods are used
for gem testing. These are complimentary and supplementary to each
other. Using extensive data from all these methods, at GII it is possible
to get a “complete and relevant”
knowledge of the gemstones. |
| FT - IR: Fourier Transform Infrared Spectroscopy : |
|
| FTIR is a non-destructive vibrational spectroscopy methods used for characterising a variety of materials. |
| At GII, FT – IR is an important “work–horse” routinely used to identify the following : |
Type of Diamonds |
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Heat treatments of rubies & sapphires |
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Oiling and filling in emeralds done to improve clarity |
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Bleaching and dying in jade etc. |
| Laser Raman Spectroscopy : |
|
This is another powerful
non-destructive vibrational spectroscopic technique, discovered by
Sir C. V. Raman, used extensively for characterising a wide variety
of materials. |
| At GII, this is being routinely used for : |
|
“ Fool – proof ” identification of diamonds
and its stimulants, |
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Colouration and thermal history of diamonds &
all other gemstones and inclusions thereof. |
| UV/Vis/NIR Absorption : |
|
Absorption spectroscopy
in UV/Visible again is a standard non-destructive method to identify
the species responsible for the colour in solids. |
| At GII this powerful technique is used to : |
|
| Fluorimeter and Diamond View : |
 |
 |
Fluorescence
& phosphorescence are complimentary to the absorption techniques,
as they involve reemission of light following excitation with high
energy light. Whereas the Fluorimeter gives spectral information about
light emitting species in diamonds and gemstones, the Diamond View
gives the direct mapping of emitting species, distributes diamond
samples. |
| At GII these techniques are routinely used to identify : |
|
Natural and synthetic diamonds and also the emission properties
of all the other gemstones. |
| Diamond Sure & Diamond Spotter : |
|
 |
These are standard and
quick methods to identify diamonds at a preliminary level. |
| D- Scope Microscope : |
 |
A gemmological
microscope is routinely used in the lab. Designed to utilize a variety
of illumination techniques, it helps us to investigate the internal
microscopic world of gem stones. A lot of information can be extracted
from general observations under a gemmological microscope. |
| At GII the microscope is routinely used to identify the following : |
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Oil in fractures of an emerald indicating clarity enhancement. |
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Colour concentration in cracks and pits of jade as an indication
of dying. |
