Is 456 carats as heavy as a Billiard Ball?
It's about three-fifths as heavy as a Billiard Ball
The weight of a Billiard Ball is about 794.407894738130 carats.
(American-style, WPA specifications)
Per the World Pool-Billiard Association, a billiard ball weight must weigh between 759.868421053870 carats and 828.94736842240 carats. According to legend, the difficulty in obtaining elephant ivory for the manufacture of billiard balls in the 19th century inspired the search for a replacement material, which led to the development of the first industrial plastic.
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