Billiard balls can refer to the balls used for English billiards, pocket billiards, or snooker.
Early billiard balls were made of ivory. Today, billiard balls are made of either a polyester based or phenolic based resin.
In English Billiards, 1.
Billiard games usually requires a table, sticks balls and a ball rack. These items are what's used in modern billiard games and is common equipment to use.
No one person can be credited for billiard balls. It is known that they were in use in the very early 1400's, but there is no record of its development from an outside game to an indoor table game.
The earliest billiard balls were made of wood and then clay. Ivory was also used, the first ivory ball dates back to 1588. Today, billiard balls are made from plastic materials.
Billiard balls used in snooker tend to be bigger and heavier then the balls used in pool. The billiard ball for instance is often 61.5 mm as opposed to the 57.15 mm for most pool balls.
Billiard balls collide quite elastically. Ideally, the total change in momentum is zero.
In most Billiard, Pool and Snooker official tournaments, the balls used are made in Belgium by a company called Saluc - Aramith.
Of an elastic collision