How do you make a pool table ball?

Question

what is it made of?

Answer 1

I can't tell you about pool balls but my wife makes golf balls that start as injection molding, resins, and finally clear coat finishes! Very intresting process! Boring JOB!

Answer 2

With my spelling yeah right hardass plastic

ivory  center of tusk

celluloid careful they would explode on a hard shot

Answer 3

High quality ones today are made of phenolic resin.  High quality ones of yesteryear were made of ivory.  Not quite sure when the transition happened though.  Check the reference for more info.