What is the difference between a variety and a varietal?

A lot of folks confuse these terms. One word refers to grapes, the other to wine. Varieties are types of grapes, i.e. Cabernet Sauvignon grapes, Chardonnay grapes, Zinfandel grapes, etc. A varietal on the other hand is a wine that is labeled as being made from one grape variety, for example our Chardonnay – Santa Lucia Highlands.