Sardinian corals are different from other coral species, and there is no official classification. The quality and value of coral in Sardinia are mainly evaluated by its color and texture. Generally speaking, the brighter and more uniform the color, the fewer defects, the tighter the texture and the better the light transmittance, the higher the value of Sardinia. Sardinian corals are often used to make jewelry and handicrafts, such as bead bracelets. Therefore, Sardinia has no specific classification, and its value mainly depends on its color, texture and degree of defects.