Related Clues:

• Mah-jongg pieces
• Mollusk interior
• Shuttle cover
• They may be up against the wall
• Backsplash units
• Pagoda roofing
• Mosaic units
• Scrabble rack fill
• Inlay on some guitars
• Certain shell liner
• Some game pieces
• Button stuff
• Iridescent shell layer
• Mollusk's secretion
• Installs a bathroom floor, perhaps