Ivory fruit and ivory fruit are both hard fruits, but due to many factors, their hardness can be different. Generally speaking, if the density, water content and composition of ivory fruit and ivory fruit are the same, then the hardness of ivory fruit is higher than that of ivory fruit. Because the composition structure of ivory fruit contains more lignin, and lignin endows the structure of plant organisms with toughness, which can improve its hardness and durability. In addition, the surface of ivory fruit is harder, because it may undergo natural drying and other processes. However, due to different parameter conditions, the hardness of the two may be different. The specific situation depends on the actual situation and cannot be generalized.