Related Clues:

• Hard substance containing nitrogen on part of the estate?
• Northern area that gave birth to pearl?
• Mother-of-pearl — crane (anag)
• Brooch feature, maybe
• Pearly coating
• Oyster part also called "mother-of-pearl"
• Mother-of-pearl from northern area
• Mosaic material
• Prynne in 'The Scarlet Letter'
• Iridescent material
• Abalone shell lining
• Hawthorne heroine
• Iridescent button material
• Conch creation
• Abalone-shell liner