They used to be but nowadays it would be very expensive and generally it is illegal to hunt African game to get the ivory but that doesn't mean it doesn't happen.
The plastic piano keys were introduced in the 1920's.
Some older pianos took off their chipped or yellowed ivories and replaced them with new white plastic keys when plastic keys were introduced.
It is very hard to replace a broken or chipped valuable ivory key because they varied so much in shape, color and thickeness. Plastic keys were the answer. Plastic keys were cheap, white and stronger than the ivory keys.
Even billiard balls, dice, cutlery handles, fans, parasols, back scratchers, teapot handles, hair combs, glove stretchers, Chinese snuff bottles, crochet hooks, gavels, pistol grips, gaming counters, checkers markers and tobacoo accessories used to be made with ivory.
88 KEYS on a Piano
There are 88 keys on a piano (52 white keys and 36 black keys).
A normal piano has 88 keys. A "Cottage piano" has 64 keys. The 7'4'' Bosendorfer has 92 keys. The 9'6'' Bosendorfer has 97 keys. Standard pianos have 88 keys.
eighty-eight
The piano has a total of 88 keys.
88 Piano Keys
88 KEYS on a Piano
something about 88 piano keys
88 keys on a piano.
There are 88 keys on a piano (52 white keys and 36 black keys).
A normal piano has 88 keys. A "Cottage piano" has 64 keys. The 7'4'' Bosendorfer has 92 keys. The 9'6'' Bosendorfer has 97 keys. Standard pianos have 88 keys.
There are 88 keys on a piano.
88 Keys on a piano keyboard.
eighty-eight
The piano has a total of 88 keys.
88 keys on a standard piano, upright and grand.
88 keys