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Crochet Nearly Square Spiral Solid Granny in three colours of Bernat Baby Blanket yarn. Free pattern: This pattern is in video format only. Follow along to make your own.

Continuous Square Spiral Crochet Blanket in two colours. Easy Spiral Granny Square Crochet Baby Blanket using Picasso yarn and Softly Baby yarn.

Crochet: How to Crochet spiral coaster / potholder with spiral surface stitching, beginners pattern

An increasing spiral motif, like a spiral shell. (The instructions are all in one image.)

How to crochet a spiral granny square using four colours. To make this in two colours, just simply follow the same pattern but use two strands in one colour, and two strands in your other colour. The order you place them will create different effects.

Written pattern can be found here: http://happyberrycrochet.blogspot.co.uk/2015/10/how-to-crochet-spiral-granny-square.html

The Crochet Charm: Spiral Flower Pattern. Pretty motif, but involves some sewing at the end.

A two-colour spiral is pretty, but tricky to start. This video tutorial is nice and clear.