It's about as heavy as a sheet of Paper.
It's about nine-tenths as heavy as an Eye (Human).
It's about one-and-one-tenth times as heavy as a Quarter.
In other words, 99.1 grains is 1.133 times the weight of a Quarter, and the weight of a Quarter is 0.8826 times that amount.(United States quarter-dollar coin) (a.k.a. Quarter dollar, a.k.a. America the Beautiful quarter, a.k.a. two bits)
The America the Beautiful series quarters, which began to enter circulation in 2017, weigh 87.5 grains each. In answer to the common riddle, there are 119 ridges around the edge of the coin in its current design.
It's about one-and-three-fifths times as heavy as a Die (Dice).
In other words, the weight of a Die (Dice) is 0.63 times 99.1 grains.(for six-sided, 16 mm, rounded cube)
A die, of the size most commonly used in board games and casinos, typically weight 63 grains. The use of dice and dice-like tools predates written history, with the oldest known examples belonging to a 5,000-year old backgammon set uncovered during an archaeological dig in modern-day Iran.
It's about half as heavy as a Battery (AAA).
In other words, 99.1 grains is 0.54 times the weight of a Battery (AAA), and the weight of a Battery (AAA) is 1.9 times that amount.(Alkaline)
An "AAA" size battery weighs 190 grains. Batteries are named by the American National Standards Institute (ANSI) Committee C18 and AAA batteries were given their name because they were smaller than the "AA" and "A" size batteries which were invented first.
It's about two-fifths as heavy as a Compact disc.
In other words, 99.1 grains is 0.43 times the weight of a Compact disc, and the weight of a Compact disc is 2.3 times that amount.(a.k.a. CD)
A compact disc typically weighs 230 grains. Data is stored on CDs by encoding into the track a series of tiny pits — each between 3.5 and 850 µm (0.00014 and 0.033 in) in length.
It's about two-and-a-half times as heavy as a Penny.
In other words, the weight of a Penny is 0.38 times 99.1 grains.(United States) (formally one-cent coin) (Union shield design, 2010-present)
The weight of a United States penny is 39 grains. According to a 2010 report by the United States Mint, the cost of manufacturing and distributing a penny is $0.0179 — more than its face-value.