Gemstone testing is the process of evaluating the authenticity and quality of gemstones. This involves using various tools and techniques to determine characteristics such as color, clarity, cut, and carat weight. Common methods include visual inspection, refractometry, and spectroscopy, which help identify whether a stone is natural, synthetic, or treated. Professionals, such as gemologists, often perform gemstone testing to provide accurate assessments for buyers and sellers. This ensures that consumers make informed decisions when purchasing gemstones, whether for jewelry or investment. Reliable testing can also help prevent fraud in the gemstone market, protecting both buyers and sellers.