All the colors of the rainbow are vividly on display with this 3-Strand Chunky Rainbow Necklace. Amber, Turquoise, Olive Shell, Sponge Coral, and Spiney Oyster are hand-strung, accented by a large complementary Pendant made up of some of these same stones set in Sterling Silver. (18" Long). Chunky Rainbow Earrings - Matching Loop Earrings of the same matching stones and shells. Pierced Only - (1 1/4" Long). Chunky Rainbow Necklace & Earring Set.