Black piano keys, informally
Else clues• Black keys
• Black piano keys, familiarly
• Black woods
• Durable woods
• Part of a keyboard
• Piano's 36, familiarly
• Sharp and flat keys, on a piano
• Some keys
• Some piano keys
• Sources of wood for cabinetwork
• Trees for keys
• Trees that yield heavy wood
• Trees used for making piano keys
• Trees whose wood doesn't float
• Trees yielding black wood