It's about one-and-one-tenth times as heavy as a Billiard Ball.
In other words, 2,625 grains is 1.0434782608696 times the weight of a Billiard Ball, and the weight of a Billiard Ball is 0.95833333333330 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.
It's about one-and-one-tenth times as heavy as a Puck (Hockey).
In other words, 2,625 grains is 1.0434782608696 times the weight of a Puck (Hockey), and the weight of a Puck (Hockey) is 0.95833333333330 times that amount.(Ice hockey)
A standard ice hockey puck weighs between 2,406.250 grains and 2,625 grains. Hockey pucks can be shot or passed at speeds of up to 160 kph (99 mph) during games.
It's about nine-tenths as heavy as a Hamster.
In other words, the weight of a Hamster is 1 times 2,625 grains.(for Syrian hamster, a.k.a. golden hamster, a.k.a. Mesocricetus auratus; adult)
An adult Syrian hamster has a typical weight of about 3,000 grains. Known for transporting food in the pouches of their cheeks so that they can bury it later, some hamsters can store up to 400,000 grains of food in their borrows.
It's about one-and-one-fifth times as heavy as a Baseball.
In other words, 2,625 grains is 1.17073170731710 times the weight of a Baseball, and the weight of a Baseball is 0.854166666666650 times that amount.(MLB rules)
Per Major League Baseball rules, a baseball must weigh between 2,187.50 grains and 2,296.8750 grains. A major league pitcher can throw a baseball at up to 150 kph (91 mph) (with a fastball pitch), with record-setting pitches as fast as 171 kph (106 mph).
It's about one-and-one-fourth times as heavy as a Battery (D).
In other words, 2,625 grains is 1.260 times the weight of a Battery (D), and the weight of a Battery (D) is 0.7940 times that amount.(Alkaline)
A "D" size battery weighs 2,080 grains. The D size battery is the oldest of the modern battery sizes, first invented by the National Carbon Company in 1898.
It's about one-and-four-fifths times as heavy as a Deck of Cards.
In other words, the weight of a Deck of Cards is 0.560 times 2,625 grains.(ISO 216 B8 size, a.k.a. "poker size" 63 x 88 mm, 52-card deck)
A deck of 52 ISO 216 B8-size playing cards weighs 1,500 grains. Utilizing nearly 3,700 decks, the record-holding largest card tower was built in early 2010, stood over 3.5 m (11 ft), and weighed over 3,500,000 grains.
It's about half as heavy as a Human Heart.