1. color: most aquamarine is light blue with a slight green tone, and its color is like the shallow sea of a resort, fresh and pleasant. The color is sky blue to sea blue or cyan, and bright and flawless bright blue to light blue is the best.

2. Crystal morphology: topaz is rhombic and zircon is tetragonal. Although the colors of artificial glass and artificial blue spinel are similar to them, they are all isotropic and have no dichroism, which is the difference.

Third, thermal conductivity: natural aquamarine has poor thermal conductivity and feels cold close to the skin. If it is made of glass, it will heat up faster.

Four. Inclusions: At present, the imitation of Shanghai sapphire in the market is mainly filled with fillers. Observe whether there are fillers in the gaps of the gem.

5. Radiation test: There will be no radiation treatment in the treatment of aquamarine. If someone tells you that your aquamarine has been irradiated, it's probably someone who knows little about it.

6. Features: Natural sea blue cotton wool is white. If you encounter blue cotton wool, color it and attach it to the cotton wool.