This is a Merlot grape. Certain grapes have certain shape to them. This cluster has a what is called a "wing". Most grapes very in shape and size. Some grapes are tightly clustered together, others are loose. Distinguishing marks can also be found in the clusters branches and the color of the branches.
I labeled these grapes for the tasting room. I went out to the vineyard and picked them. The idea was given to me by the wine maker herself. It was neat to pair the grape with the actual wine in the tasting room. Wine making is a beautiful art.