Giant clam in the name of the first in the eastern han dynasty era.Recorded in compendium of materia medica, tridacna lock core, sedative effect, it is the largest sea shells, up to 1 m in diameter. Shell, white and sleek, yellowish-brown shell end cut into bead wheel trench of the pattern, hence the name as a giant clam.
Strand Length:around 7.5 inches
Number Per Strand: around 24
Mohs Hardness: 3.5^