1. Sardinia is similar in color to Aka. Colors in Sardinia are still very popular, such as orange, orange, vermilion, true red and crimson. In Sardinia, the "bovine blood red" grade is very precious and the price is very high.

2. Red Sardinia has no white nucleus. Although wormholes and white nuclei are very common in natural red corals, there are no white nuclei in Sardinia, and there are few white spots, which are as big as the tip of a needle and generally not obvious to the naked eye. Sardinia has a high smoothness and is worth buying.