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What is Gemology? Gemology is the study of precious stones; where they are found, how they are formed, their physical and optical properties, and how they are identified. The beauty, durability, and tangible value of gemstones have been a source of fascination and intrigue for centuries.
The tools used by gemologists for the identification and grading of different gemstones range from the simple and familiar to the high-tech and exotic.Most gemstones can be identified by a few basic tools that every gemologist should have at hand.nother required tool for gemologists is the refractometer. A small drop of liquid with a high refractive index (RI) is placed on a glass cylinder in the top of the refractometer and illuminated from a separate light source (sometimes white light, but a monochromatic light source provides better accuracy).