Related Clues:

• Iridescent gem
• It may be cultured
• Off-white shade
• One on a strand
• Sea prize
• Gem
• Lustrous gem
• Thirty years' gem
• Unit of wisdom?
• Stickpin head
• Steinbeck story (with "The")
• Necklace part
• Gem of the ocean
• Unit of wisdom
• Strand unit