Is 91.1458333333330 pennyweights as heavy as a Billiard Ball?
It's about nine-tenths as heavy as a Billiard Ball
The weight of a Billiard Ball is about 104.817708333330 pennyweights.
(American-style, WPA specifications)
Per the World Pool-Billiard Association, a billiard ball weight must weigh between 100.260416666670 pennyweights and 109.3750 pennyweights. 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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