Directorate of Geology
Geology Department

Gem Testing Laboratory

The State of Odisha known as Mini Brazil, the glittering land of gemstones, has assumed international prominence because of its wide array of coloured stones and diamond. Against this backdrop, the Gem Testing Laboratory was established in the Directorate of Geology in 1991 under the auspices of the United Nations. It is actively involved in identification and characterisation of coloured stones and diamond on promotional and commercial basis. Its highly trained personnel are well versed with all aspects of modern determinative gemmology including distinction of natural gems from among the myriad synthetic, imitation   Gem Testing
and fake stones.The laboratory is engaged in identification of thousands of coloured stones, diamond, organic gems, synthetic stones and certification thereof each year. Inclusion study aided by photomicrography, support the gemstone and diamond exploration of the Directorate. The testing charge is the lowest in comparison to that of any other reputed laboratory of the country.
The laboratory is well equipped with the following most modern gem testing instruments.
  • Gemmolite microscope with microphotography camera attachment
  • Digital scanning spectroscope
  • Duplex II Refractometer
  • Metler electronic balance with auto specific gravity determination unit
  • Moissanite tester
  • Polariscope with Konoscope
  • U V Lamp
  • Dichroscope
  • Chesea colour filter
  • Stereobinocular microscope
  • Fourier Transform Infrared (FTIR) Spectrometer