Some examples of gemstones include diamonds, rubies, sapphires, emeralds, and opals. How are gemstones valued? Gemstones are valued based on several factors including color, clarity, cut, and carat weight. Gemstones with rare and vibrant colors, high levels of transparency and perfect cut are ...
Between 2000 and 2006, the market was full of richly coloured padparadscha sapphires. Lab testing proved that they were actually orange sapphires, diffused with beryllium ions. Even in natural stones, sapphires have been found to contain significant amount of beryllium impurities. Be the first to...