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Quilting Block Tutorial: Mosaic Pinwheel Quilt Block

The Mosaic Pinwheel Block is such an easy block to put together and it creates a lovely effect when a number of blocks are sewn together.  You are really going to be pleasantly surprised when you see just how easy it is to make. The Mosaic Pinwheel quilt block looks great in a quilt, cushion cover or even a table runner.

Watch the video tutorial below or scroll down for the written instructions

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

Method:

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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.)

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

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

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

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  • 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.

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

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