Prism Square | Overlay Mosaic Crochet Pattern

Find your flow with Prism, a geometric overlay mosaic crochet square built around a repeating angular motif and a satisfying, rhythmic construction. Worked in the round from the center outward, the pattern gradually reveals its symmetrical design as you crochet, creating a relaxing and almost meditative stitching experience.

The finished square measures approximately 12 × 12 inches (30 × 30 cm), making it easy to incorporate into blankets, cushions, bags, garments, and other modular crochet projects.

Finished Size

Approximately 12 × 12 inches (30 × 30 cm) after blocking.
Final stitch count: 59 stitches per side.

Materials

• Sport weight yarn
• Approximately 91 yds (83 m) / 0.88 oz (25 g) of the dark color
• Approximately 128 yds (117 m) / 1.23 oz (35 g) of the light color
• 3.5 mm (E-4) crochet hook

Gauge

20 sts × 18 rows = 4 × 4 inches (10 × 10 cm) in overlay mosaic crochet.
Gauge is not critical for this pattern, but it will affect the finished size and yarn usage.

This Pattern Includes:

• A short introduction explaining the basics of this overlay mosaic crochet construction, including how to start and finish the rounds, switch colors, and so on.
• A traditional overlay mosaic crochet chart using the classic two-color grid with blank and X-marked squares. The chart is presented as one section of the square, which is repeated four times, together with the corner instructions.
• Full row-by-row written instructions for crocheters who prefer written patterns instead of charts.
• Contact information so you can easily reach me if you have questions or would simply like to share your finished project.

Skill Level: Easy.

Basic familiarity with overlay mosaic crochet is helpful, but the introductory section explains the construction used throughout the pattern.

Language

This pattern is written in English using US crochet terminology.

Color Tip

Overlay mosaic crochet relies on contrast to make its geometric designs stand out. For the clearest stitch definition, choose one light and one dark color rather than two shades of similar value. A strong contrast will emphasize the repeating Prism motif, but gradients and unexpected color combinations can create beautiful variations of your own.

Discover More Squares

Prism is part of the Echo Squares Collection, a series of geometric 12-inch overlay mosaic crochet squares designed around satisfying repetition, consistent construction, and a relaxing crochet rhythm. Mix and match them to create your own unique combinations while keeping a uniform finished size.

Looking for even more variety? Explore the Year Squares Collection, featuring 12-inch crochet squares in different techniques, textures, and stitch patterns that can also be combined into larger projects.

Copyright

This pattern and all accompanying photographs are protected by copyright. The pattern is intended for personal use only. It may not be copied, redistributed, translated, shared, or resold in any format, either printed or digital.

You are welcome to sell finished items that you personally make using this pattern. Credit to the designer is always appreciated. If you share your project online, I’d love to see it. Please tag @itwasyarn.

Happy crocheting!