The skill level for this pillow is intermediate and I really would advice to not start this project when you are a beginner. Crocheting mosaic can be quite a challenge. This beautiful pillow is made with Scheepjes Stone Washed yarn, one of my favorite yarns.
You can find the free crochet pattern of the Dioon Pillow on the website of My Crochetory. You will have to scroll down on that page for a while before you find the pattern.