This was the second wine I tasted during last week’s virtual tasting of 2012 Finger Lakes rieslings, and it was a welcome step up. Dr. Konstantin Frank Vinifera Wine Cellars 2012 Dry Riesling ($15) offers intense aromas of grapefruit and lime are accented by notes of citrus blossom, wet river rock, smoky gun flint and just a touch of botrytis. The palate is more peachy, but still shows bright citrus fruit — mostly grapefruit — and a minerally vein that runs from start to finish. Crunchy acidity provides great focus and verve. The medium-long finish is dry, but not harshly so.…