Related Clues:
- Traditional key material
- Scrimshaw material
- Like a lofty tower
- Soap whose first slogan was "It floats"
- Wood so dense it doesn't float
- Dark black hardwood
- Ivory's counterpart
- Ivory's partner, in song
- Like 36 piano keys
- Piano key
- Obsolescent piano key material
- Merchant's partner
- Walrus tusk, e.g.
- Off-white hue
- Obsolete piano key material