Here’s a crochet stitch that produces a nice shell stitch. It’s a relatively basic stitch that works nice for a blanket, scarf, shawl, and more. There is a nice lace effect formed by V stitches on one row, with the shells or fans above on the next row.
Here’s a pretty crochet shawl that is great for any time of the year. The Beachy Keen shawl is easy to make with this free pattern and video from Naztazia.