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How to Sew a Slanted Diamonds Quilt Block
The Slanted Diamonds quilt block is a striking geometric design using angled diamond shapes cut from fabric strips and arranged into chevrons, zigzags, or other bold patterns. It's a fun and rewarding challenge for any quilter!
Materials Needed
- Fabric for the diamonds and background
- Rotary cutter and cutting mat
- Quilting ruler
- Sewing machine and thread
- Iron
Step-by-Step Instructions
- Cut your fabric into strips that are 1" wider than your desired finished diamond size. For example, for 3" finished diamonds, cut 4" strips.
- Cut the strips into diamonds. Using your quilting ruler and rotary cutter, turn the ruler at an angle and cut the diamonds along the diagonal to create the slanted shape.
- Arrange the diamonds in your desired pattern — chevrons, zigzags, or any design you like.
- Sew the diamonds together in rows using a ¼" seam allowance. Press the seams open.
- Sew the rows together to complete the block.
- Trim the edges to ensure the block is square.
- Repeat to create as many Slanted Diamonds blocks as needed for your project.
Tips: Cut all diamonds the same size for consistency. Press seams open to reduce bulk. Use a consistent ¼" seam allowance throughout. Experiment with different color combinations for a unique look!
Covered Corners Technique
How to Resize Quilt Blocks
The first step in modifying any quilt block is to decide on your finished block size. You can base this on doubling a pattern, cutting it in half, or working with your available fabric.
Note: When working from a pattern's cutting instructions, remove the seam allowance before scaling. For example, if your pattern calls for 3½″ squares, subtract the seam allowance (½″), double the finished size (3″ → 6″), then add the seam allowance back (½″) — giving you a 6½″ cut piece.
Resizing Square Blocks
Add ½″ to your finished block measurement. For a 4″ finished square, cut a 4½″ square of fabric.
Resizing Rectangular Blocks
Add ½″ to both the length and width. To double a 3″ × 4″ block, cut a 6½″ × 8½″ rectangle.
Resizing Half-Square Triangle Blocks
Add 7/8″ to the desired finished block size. For a 4″ finished HST block, cut 4⅞″ squares.
Resizing Quarter Square Triangle Blocks
Add 1¼″ to the desired finished block size. For a 4″ finished block, cut 5¼″ squares.
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