With a hardness of approximately 5 and a porcellaneous luster near its lip, the shell exhibits a silky flame structure very similar to the pearl itself.

硬度大约5左右。开口处附近呈瓷状光泽。贝所显现的丝状火焰纹结构和美乐珠很类似。

They display a different pattern of flame structure to an experienced eye, which consists of concentric radiating flames and parallel banded layers displaying a distinct “pseudo-chatoyancy” effect.

对于有经验的人而言，仿制品显示处不同于美乐珠的火焰纹结构图案由同心的放射状火焰纹，和平行条带层显示出清晰的变彩假象。