FTIR spectroscopy with a very compact and robust instrument as Bruker Optics ALPHA can be a valuable tool in the gemological laboratory. The “diffuse reflectance” method seems to be the most universal and easiest approach for the analysis of gemstones. FTIR spectroscopy can also be used in other fields in gemology e.g. discriminate synthetic emeralds or lead glass treated rubies from their natural counterparts.
Very small mounted stones in jewelry that are in close contact with each other can be measured selectively with the FTIR microscope LUMOS. The LUMOS stands out due its full automation and ease of-use combined with sample visualization and infrared spectroscopic performance of highest quality.
The high-throughput-screening accessory (HTS-XT) is capable to measure and classify large numbers of diamonds automatically.