Check out my Etsy! ... This is a very often made and well known origami model! It's the spiral snail shell by Toshikazu Kawasaki, but it's a complex model and the diagrams are hard to understand. This
by Origami Zone
by Marigami
by How to... Science, Craft Plus
by DreamTrueZ
by JeremyShaferOrigami
by trpattern
by Paper Folds - Origami & Crafts !