This invention presents a method and instrumentation for gemstone identification and metrology using polarization imaging. It is a simple and cost-effective metrology system that distinguishes gemstones of various materials and cuts. The invention uses a combination of filters, a polarization camera, and other elements to form an image of the gemstone, from which parameters can be calculated and used to analyze the gemstone. Background: Gemstone metrology plays a crucial role in research and development, appraisal, design, and the production of gemstones and jewelry. Natural and synthetic gemstones each have distinct optical characteristics. Precise optical measurements of color, cut, clarity, and birefringence allow for the differentiation between gemstones and serves as a valuable tool for quality control, authentication, and defect detection throughout gemstone growth, evaluation, faceting, and manufacturing processes. Applications:
Advantages: