cork

When I first saw this, I didn't believe it was supposed to be how a semi-cylindrical piece of wood looked like up close.

cork 100X

Corks are generally made of an impenetrable buoyant material. The dark gray bark that covers a corn oak is used to create the cork. While peeling off the tree bark may seem harmful, corn oaks are unique because of their ability to regenerate their outer layer.

cork 400X

I personally didn't expect the cork to look as rough because it seemed quite smooth when viewed through the naked eye. But since it was made from the bark of an oak tree, I could also understand why the cork was quite bumpy.

cork 400X