As you can sort of see the rock fragment is about one centimeter long.
The sharp end facing to the left was in first, and was the sharpest side of the rock.
It is a piece of gravel, but went I was extracting it, I really thought it was a piece of obsidian. Upon examining the rock I realized it was gravel, much to my disappointment.
I was really hoping the rock fragment was obsidian which would be possible due to the location of the pasture.
I got pretty excited.