Since this is a nerd forum and I am a nerd I will step up the pedantry by pointing out that a grain is a foundational unit of measurement of mass[0] equivalent

Since this is a nerd forum and I am a nerd I will step up the pedantry by pointing out that a grain is a foundational unit of measurement of mass[0] equivalent to 64.798 milligrams, making discussion of both boulder sized and tiny grains of salt somewhat nonsensical. [0] https://en.m.wikipedia.org/wiki/Grain_(unit) https://en.m.wikipedia.org/wiki/Grain_(unit)