Introduction
Gemstones have captivated humanity for centuries with their vibrant colours, unique properties, and inherent rarity. But how can we truly understand their composition and verify their authenticity? At LTB Lasertechnik Berlin GmbH, we offer cutting-edge Laser-Induced Breakdown Spectroscopy (LIBS) solutions, a powerful technique revolutionising gemstone analysis.
Why using LIBS for Gemstones?
Laser Induced Breakdown Spectroscopy is an (almost) non-destructive analytical technique that uses a high-energy laser pulse to vaporise a tiny portion of a gemstone’s surface. This creates a plasma plume that emits light, containing invaluable information about the gemstone’s elemental composition. By analysing this emitted light with our advanced Echelle spectrometers, gemmologists can uncover the hidden secrets within each precious gem. Ps: No need to worry, as the area of interaction between laser and gemstone is tiny it can be easily polished afterwards.
The technique significantly aids in the scientific research and classification of gemstones. By studying the elemental composition across different gem types, researchers can deepen their understanding of gem formation processes and build extensive databases for future reference.
When light passes through a gemstone, it absorbs certain wavelengths of light and reflects others. The spectroscope measures these wavelengths and displays them as a spectrum, which looks like a colorful band of light. Different gemstones absorb light at different wavelengths, creating unique patterns. By comparing these patterns to known gemstones, gemologists can identify stones accurately.
The spectroscope is particularly useful for identifying colored gemstones, such as sapphires, emeralds, or garnets, which may look similar to the untrained eye. It can also be used to detect synthetic gemstones or treatments that might have been applied to enhance the appearance of a gem. For instance, a spectroscope can distinguish between natural and heat-treated sapphires by revealing differences in their light absorption patterns.
For gem enthusiasts and professionals alike, mastering the use of a spectroscope can be a game-changer, enabling accurate gemstone identification and helping to ensure that you are buying or selling authentic, high-quality stones.
