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42,000,000 grains is about 15,000 times as heavy as a Billiard Ball
In other words, it's 16,695.6521739130 times the weight of a Billiard Ball, and the weight of a Billiard Ball is 0.0000598958333333330 times that amount.
(American-style, WPA specifications)
Per the World Pool-Billiard Association, a billiard ball weight must weigh between 2,406.250 grains and 2,625 grains. 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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