Most notably known as "Riesling". A grape varietal used in the production of white wine and is used as a blending agent in the production of Ice Wine in Canada. Although the origin is unsubstantiated, the noblest variety is found in Germany. The varietal is also grown in the United States (CA), France, Austria, Australia, and New Zealand. German and French made Riesling is of a higher quality than those made in the United States. California’s "Johannisberg Riesling" is the highest quality in the United States. Note that those California wines labeled only "Riesling" are of a much lesser quality. Because it is a noble varietal and a difficult vine to grow, true Riesling is a pricier wine.