Zinfandel - The much loved red grape of California, Zinfandel is grown in few areas of the world. In fact, its history has been mysterious. Zinfandel has recently been established as being identical to the Italian grape Primitivo. Zinfandel has a mouth-filling, thick berryness that is sometimes described as being jammy or chewy. White zinfandel (not a separate grape variety) is made when zinfandel grapes are fermented without their dark purple skins.