... )randomproduction thickness3~5mmshell size(mm)300*300 or otherscolornature shell colorshapeSquare , rectangle , irregularfeaturesenvironmental , no harm to bodyno ... shells, such as mop shell, ablone shell, Chinese river shell, black MOP , yellow MOP , pink Shell, pen Shell etc. 8) Processing ... contact me ,i would like to give you more details! Ms selene dai semiprecious stone,natural agate, agate ...