For repairing chipped ivory, Richard Wagner has a product called
Acrylikey, an acrylic polymer which can be tinted for color matching.
I have used it many times to avoid replacement.  It can make an invisible
repair.    $40.00

  Richard Wagner
  Box 1952
  Lake Oswego, Oregon  97035
  (503) 697-9254
  email: rjwag@pacifier.com

Jon Page
Harwich Port, Cape Cod, Mass.