This shell stitch is very pretty and easy to make, it is a repetition of 2 rows throughout the work .
It is made of a total of 82 rows. This took me roughly 3 days to finish.
A video tutorial is linked in the pattern for extended help.

Materials
3 Dark gray, 3 dark green, 3-night blue worsted yarn
7.5 mm crochet hook.

Measurements
112/89 cm