Gem Testing Center

GIT's CIBJO registered laboratory (officially accredited by the World Jewellery Confederation since May 2000) has several highly experienced gemologists and is equipped with the world-most advanced instruments. Its gem testing services include
• Distinguishing natural, synthetic and imitation gemstones
• Analyzing the enhancement methods of gemstones
• Distinguishing natural, seawater cultured pearls and freshwater cultured pearls; pearl treatments
• Distinguishing natural, synthetic and imitation diamonds
• Identifying treatment types of diamonds
• Ruby & Sapphire grading
• Diamond grading
• Determining Gemstone’s country of origin especially rubies, sapphires and emeralds
• Identifying the variety of jade and quality enhancement method applied
• Laser inscription on gemstone girdle

The center offers 4 types of gemstone reports as follows:

1. Gemstone Memo (Identification result without gem identification report)
Gemstone Memo indicates variety, type, proportion, weight and brief description of the gemstone which is
sealed in a clear plastic pocket.

Gemstone Memo

2. Gem Identification Report
      Gem Identification Report indicates variety, type, proportion, weight and full description including a digital
      photograph of the gemstone. Quality grading for color, clarity and cut is available for ruby and sapphire.
      The details and photograph of the gemstone are printed on a special type of paper which bears a three-
      dimensional hologram sticker with an image of the Grand Palace to prevent counterfeiting. Each report is
      signed by two gemologists.

Gem Identification Report

3. Mini Report
      The report indicates variety, type, proportion, weight including a brief description. The report is in pocket-
      size which makes it easy to carry and to display with the jewelry in a showcase. The service has been
      available since 1^st January, 2002.

Mini Report

4. Diamond Grading Report
The report indicates the variety, type, proportion, weight and the clear description including the quality of
the diamond according to the 4Cs (Color, Clarity, Cut and Carat).

Diamond Grading Report

5. Gem Identification Card
Gem identification card indicates variety, type, proportion, weight and brief description of the gemstone.
It easy to carry and to display with the jewelry in a showcase. The service has been available in July, 2008.

Gem Identification Card

1. Diamond Identification
2. Gem Identification (Report with photograph)
3. Gem Identification Verbal Assessment

Basic Instruments

Refractometer, Polariscope, Gemmological Microscope, 10x Loupe, Specific Gravity Balance, Day Light & UV-Lamp, Spectroscope, Diamond Tester (Thermal conductivity meter), Moissanite Tester, D-screen, Chelsea Color Filter, Dichroscope and Fiber Optic are applied as basic instruments in order to examine the physical and optical properties, size and weight of gemstone.

Advanced Instruments

These are instruments used for in-depth spectroscopic analyzing of gemstones. The instruments are used in the world’s leading gem testing laboratories. The final result is based on the deliberation from information gathered from the following instruments.

1. Energy Dispersive X-Ray Fluorescence Spectrometer (EDXRF)
     • Distinguishing between synthetic and natural gemstones
     • Analyzing quality enhancement methods of specific gemstones
     • Analyzing elements to identify the geographical origin of the gemstones

Energy Dispersive X-Ray Fluorescence Spectrometer (EDXRF)

2. Fourier Transform Infrared Spectrophotometer (FTIR)
     • Distinguishing between synthetic and natural gemstones
     • Analyzing quality enhancement of specific gemstones such as jadeite-jade with polymer impregnation
        and emerald with oil or polymer treatment to improve its clarity

Fourier Transform Infrared Spectrophotometer (FTIR)

3. Laser Raman Spectroscope (RAMAN)
     • Rapidly distinguishing the type of the gemstones such as gemstone on jewelry set and rough gemstone
     • Analyzing quality enhancement of specific gemstone
     • Analyzing mineral inclusions in gemstones to determine the geographical origin of gemstones
     • Analyzing diamonds undergone High Pressure High Temperature treatment (HPHT)

Laser Raman Spectroscope (RAMAN)

4. UV-VIS-NIR Spectrophotometer
     • Testing gemstones undergone heat treatment such as ruby and sapphire
     • Distinguishing between synthetic and natural gemstones
     • Determining the origin of gemstones
     • Analyzing the quality enhancement of certain type of gemstones
     • Analyzing the natural quality of diamond color

UV-VIS-NIR Spectrophotometer

5. Soft X-Ray Instrument
     • Distinguishing between natural and cultured pearl
     • Analyzing the thickness of nacre covering
     • Distinguishing diamond and diamond replicated gemstones
     • Analyzing the clarity enhancement by glass and lead glass in certain gemstones such as diamond and
        ruby

Soft X-Ray Instrument

6. Cathodoluminoscope
• Distinguish between synthetic and natural diamond

Cathodoluminoscope

7. Laser Induced Breakdown Spectrometer (LIBS)
• Analyzing quality enhancement in ruby and sapphire undergone heat treatment with Beryllium (Be)

Laser Induced Breakdown Spectrometer (LIBS)

8. Sarin Diavision Proportion Meter
• Measuring proportion of cut diamond
• Directly generate Hearts and Arrows image of the analyzed diamond

Sarin Diavision Proportion Meter

9. The Diamond and Gem Laser Marker
• Inscribing on girdle of diamond and gemstone

The Diamond and Gem Laser Marker

10. Laser Ablation Inductively Couple Plasma Mass Spectrometer (LA-ICP-MS)

        • Distinguishing between synthetic and natural gemstones
        • Analyzing quality enhancement methods of specific gemstones
        • Analyzing of trace to ultra trace elements to identify the geographical origin of the gemstones
        • Analyzing quality enhancement in ruby and sapphire undergone heat treatment with Beryllium