Colloid
Colloid
The Wentworth Scale commonly measures grains of boulders, cobble, gravel, pebbles, sand, silt, clay and calloid.
One test to determine if a mixture is a true solution or a colloid is the Tyndall effect. If light passing through the mixture scatters, making the beam visible, it suggests the presence of larger particles characteristic of a colloid. In contrast, a true solution will not scatter light and the beam will be invisible.