Some of the equipment used when testing our gems
Fourier transform infrared spectroscopy (FTIR)
FTIR (Fourier Transform Infrared Spectrometer) is now a mandatory tool in any modern gemological laboratory. It is routinely used for testing some of the most important gems such as diamond, emerald, corundum, alexandrite, jade, amethyst, amber and turquoise.
Where some of the treatments cannot be detected when viewed with a microscope, but the FTIR would give a conclusive result.
Some of the uses of FTIR Spectroscopy are as follows,
1.Determination of Heat treatment in Sapphires and Ruby Corundums
2.Distinguishing between Diamond and it’s imitations.
3.Distinguishing between Natural & Synthetic Diamond
4.Determination of Zircon state in Metamict or Crystalline
5.Finding out if an Emerald is Natural or Treated.
6.Distinguishing between Natural and Synthetic citrine
7.Tells us if Jade is Polymer Coated or Uncoated.
8.Distinguishing between Taaffeite, Serendibite, and Sapphirine.
9.Distinguishing between Scapolite and quartz
And more spectra…
Identify unknown materials
As early as the beginning of the last decade Raman Spectroscopy has become standard procedure in most labs.
Raman spectrometry is a nondestructive identification of gem materials, inclusions, and even fillers. Raman spectra can also be obtained from mounted gems and thus plays a convenient and accurate role in gem testing. It also plays a vital role in detecting a wide array of materials such as HPHT treated diamonds, treated jade, etc.
1.Distinguishing between a diamond and it’s limitations
2.Distinguishing between Amethyst and Iolite
3.Determination of Enstatite
4.Distinguishing between Garnet varieties – Grossular and Spessartite
5.Distinguishing between Polymer coated or uncoated Jade
6.Identification of Zircon in Metamict state or Crystalline state
UV / VIS plays an important role in the distinguishing varieties of Spinels, to find out if its Cobalt Spinel, Iron Spinel or Chromium component Spinel from its spectra. Also, helps in finding out the state of Sapphire Corundums in the Metamorphic or Magmatic state, and much more.
A sample of a gem certificate