Alexandra and Emil
Close-packing is a term used to describe grains that fit tightly together with minimal space in between them. This arrangement maximizes the packing density of the grains.
Crystals
Crystals
Crystals
When all grains in a rock are large and easy to see, the rock is described as coarse-grained.
Crystals
Crystals
The term used to describe the size and organization of the materials that comprise a rock is 'texture'.
grains
There are 480 grains in a troy ounce.
Granite does not have rounded grains but contains interlocking grains. An example of a rock with rounded grains is a sandstone.
Pollen grains