The locking portions are provided with said chain connected to both ends of the element in the pendant pendant set, so, when not expanded, through one end of the chain with the largest portion of the locking element pendant form lock necklace, or, in the start, and end, respectively, by the largest chain pendant hooking part locking element, and the other end of the smallest unit lock lock pendant elements, form another necklace,good effect.

As shown in Figure,the pendants, each set up a shell pendants pendant element, for example, set up a shell pendant pendant element a shell pendants pendant element set, and the One end of the housing is provided a connecting pendant portion of the housing .The other end pendants an open mouth , the housing via a pendant chain connecting portion is connected,the other end of the chain  is connected through the open mouth shell pendant connecting portion  and the housing through the open mouth pendant pendant stacked in the housing, a plurality of stacked layers of shell pendants so, the looks of the level of rich, beautiful appearance; and, seize the smallest pendant chain elements can expand, inside and outside the chain of the chain as a whole through the visual. Due to restrictions inside the chain length of two superimposed pendant, more convenient after a former pendants element can not be completely pulled out a large pendant element to be recovered quickly, but also to create a more coherent overall visual effect.

 Alternatively, as shown, in order to highlight the sense and saves material layer, each pendant element 401 can be used hollow manner.