Colored gemstones, also known as colored precious stones, are the general term for all colored stones in the gemstone family. Colored gemstones possess the most vivid and beautiful colors painted by nature itself, and people can't help but be deeply attracted by them at the first sight. In recent years, the Chinese colored gemstone market has entered a period of rapid growth and development. A systematic understanding of the identification, grading and evaluation of colored gemstones is more conducive to judging the value of gemstones and grasping the development trend of colored gemstones.

Spinel, with its rich colors, excellent hardness, brilliant luster, and ever - increasing price, has become the most worthy gem to acquire at present. In recent years, the spinel market has developed rapidly. What are the reasons behind this sudden popularity? What is the current market situation of spinel? How should practitioners move forward and how should consumers make choices?

This is a specially designed introductory and summary premium course for consumers, colored gemstone buyers and gem enthusiasts, aiming to explore the full picture of the sapphire world.

This is a specially designed introductory and summary essential course for consumers, colored gemstone buyers and gem enthusiasts, aiming to systematically upgrade the knowledge of ruby.

It is a specially designed introductory and summary premium course for consumers, colored gemstone buyers and gem enthusiasts. It helps beginners to advance their knowledge and enables emerald connoisseurs to identify and fill knowledge gaps.