Quilting Block Tutorial: Mosaic Pinwheel Block

The Mosaic Pinwheel Block is such an easy block to put together and it creates a beautiful effect.

What You Will Need – 12″ Finished Block

• 8 @ 4″ x 4″squares white fabric
• 4 @ 4″ x 4″squares light blue fabric
• 4 @ 4″ x 4″squares dark blue fabric

Tools Used in this Video

• Frixion Pen
• Add a Quarter Ruler
• Clover 45mm Rotary Cutter

How to Construct the Mosaic Pinwheel Block – 12″ Finished Block

• Draw a diagonal line on the wrong side of each of the white fabric squares. We used a Frixion pen as the mark can be easily ironed off.)

• Place the white fabric squares on top of each the coloured fabric squares with right sides facing. (ie. The wrong side of each of the fabrics should be facing outwards.)

• Sew a quarter of an inch line along each side of the drawn line for each of the squares.

• Slice along the line on each of the squares with your rotary cutter.

• You should now have 16 half square triangles – 8 for each colour.

• Now it’s time to trim up each of the half-square triangles. We want to trim them back to 3 1/2″. Check out our tutorial here on how to do that – How to Square Up a Half Square Triangle.
• Once your half square triangles are trimmed, you ware now ready to piece it together. Lay out the triangles as shown below.

• Now you simply need to sew the blocks together into rows.

• Once you have your blocks sewn into rows, you can now sew the rows together to form your Mosaic Pinwheel Quilt Block.