The properties of grains that determine the texture of rocks include:
- Size: The size of the grains can indicate the environment of formation and influence the overall texture of the rock.
- Shape: The shape of the grains affects how they fit together and can indicate the processes they have undergone.
- Pattern: The arrangement of the grains can give insights into the history of the rock and its formation process.
Feel and color are not typically considered properties that define the texture of rocks in a geological sense, though they can provide some information about composition and mineralogy.