The Fourier Transform InfraRed spectroscopy

The Fourier Transform InfraRed spectroscopy is used to identify organic filling agents, identify minerals, determine diamond types, and highlight certain thermal treatments of gems.

The laboratory opted for a THERMO-branded device, equipped with accessories for the study in reflection and transmission.
A second BRUCKER-branded device is equipped with a microscope for the study of inclusions.
Its main benefit lies in an innovative solution developed with the manufacturer to analyse “mixed” diamond.

Using a method derived from the pharmaceutical industry now allows the LFG to analyse large quantities of small diamonds used for paving.

It identifies:

• Diamond type (la, lb, lla, llb)
• Oil/resin filling in emeralds
• Quartz, Emerald and natural/synthetic alexandrite
• Thermal treatment of corundum
• Filling in jade
• Natural, synthetic and imitation turquoise
• Amber and plastic