Welcome to our 2025 Birthstone Blanket Crochet-a-Long! This blanket series will have 12 different and fun stitch sampler squares, this listing is for the December Cobblestone afghan block.

Each stitch sample can be used for all sorts of projects outside of the blanket crochet-a-long and can be made with any yarn type for whatever project you have in mind! To follow along with the Birthstone Blanket CAL, you will need approximately 120-200 yards of worsted weight yarn. This pattern uses basic stitches and is considered beginner-friendly.

The 4 page pattern includes:

The Cobblestone pattern
Materials and notes key
Link to the video tutorial

Materials:

5.50 mm hook
100-200 yards worsted weight yarn in a Blue color
Scissors
Yarn needle
Row counter (optional, but helpful)
The pattern uses US terminology.