Emerald has three evaluation criteria:

Color is the first condition. High-quality emeralds must be emerald green with a slight blue tone (note: at first glance, it looks green, and then it feels a little blue, not blue with green, which looks worse). Rich, pure and uniform colors give people soft visual enjoyment. Light-colored emeralds, even if they are crack-free and transparent, are not expensive.

Emerald, known as the king of emeralds, is a very precious gem (May Birthstone) and one of the four precious gems (red, blue, emerald and diamond) recognized by the international jewelry industry. Because of its unique green color, unique charm and magical legend, it is deeply favored by westerners, and recently, it has been more and more loved by China people. Among many silicate minerals, emerald is the most attractive color, so it is loved.