Grinded Black/White Mother of Pearl/MOP Shell Blanks/MOP Blanks/MOP Shell Buttons Blanks and Grinded Troca/Trocas/Trochus Shell Blanks and Troca/Trocas/Trochus Blanks and Troca/Trocas/Trochus Shell Buttons Blanks/Black MOP Shell Blanks, 16L, Top side in White, 2MM