Seeing Difference of Robusta and Arabica Coffee Bean

Coffee bean is essentially the seed of a berry from a coffee plant. The bean comes in 2 halves. Peaberry is a coffee bean which is in whole bean and not in 2 halves. In every coffee plant, less than 5% of the berries are Peaberry.

Arabica coffee beans are have a more elongated oval shape. The split in between is more S-like.

Robusta coffee beans are a rounder oval in shape. The split tends to be straighter.