It's about one-and-one-tenth times as heavy as a Billiard Ball
In other words, 855.10 carats is 1.0763991718409 times the weight of a Billiard Ball, and the weight of a Billiard Ball is 0.929023382923790 times that amount.(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.
It's about one-and-one-tenth times as heavy as a Puck (Hockey)
In other words, 855.10 carats is 1.0763991718409 times the weight of a Puck (Hockey), and the weight of a Puck (Hockey) is 0.929023382923790 times that amount.(Ice hockey)
A standard ice hockey puck weighs between 759.868421053870 carats and 828.94736842240 carats. 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 855.10 carats.(for Syrian hamster, a.k.a. golden hamster, a.k.a. Mesocricetus auratus; adult)
An adult Syrian hamster has a typical weight of about 1,000 carats. Known for transporting food in the pouches of their cheeks so that they can bury it later, some hamsters can store up to 100,000 carats of food in their borrows.
It's about one-and-one-fifth times as heavy as a Baseball
In other words, 855.10 carats is 1.20766736352880 times the weight of a Baseball, and the weight of a Baseball is 0.828042580432080 times that amount.(MLB rules)
Per Major League Baseball rules, a baseball must weigh between 690.789473685330 carats and 725.32894736960 carats. 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-three-tenths times as heavy as a Battery (D)
In other words, the weight of a Battery (D) is 0.7690 times 855.10 carats.(Alkaline)
A "D" size battery weighs 658 carats. The D size battery is the oldest of the modern battery sizes, first invented by the National Carbon Company in 1898.
It's about three-fifths as heavy as a Human Heart
It's about one-and-nine-tenths times as heavy as a Deck of Cards
In other words, the weight of a Deck of Cards is 0.530 times 855.10 carats.(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 460 carats. 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 1,100,000 carats.