Cornerstone Quilt Block

Cornerstone quilt block

Cornerstone quilt block

The cornerstone quilt block is a really pretty block, although I’ve made it too large (18″ square) for it to be used as a cornerstone.

Cutting requirements for the cornerstone quilt block

3.1/2″ squares:  twelve light blue, four dark blue, four red

3.7/8″ squares:  four red, four light blue

6.1/2″ squares:  one dark blue

3.1/2″ by 6.1/2″ rectangles:  two red




Make half square triangle units

Make half square triangle units

Making the cornerstone quilt block

Use the 3.7/8″ squares to make half square triangle units.  Place a light blue and a red square with right sides together and mark a line along the diagonal.  Sew a 1/4″ seam either side of the marked line and cut along the line.  This will produce two half square triangle units which are now 3.1/2″ squares.  Press the seam allowances towards the red and trim the two corners where fabric sticks out.

Central area layout

Central area layout

I’m showing the central area of the quilt block layout first.  The 6.1/2″ dark blue square is placed in the middle with the small dark blue squares on the corners of the central square.  The red rectangles are placed above and below the central square with two red squares on each side.

Cornerstone quilt block layout

Cornerstone quilt block layout

The outer frame is then very easy to place.  There are two red/dark blue half square triangle units on each edge, placed so that they form a larger red triangle pointing away from the middle.  These form the corners of the large red square.

The rest of the outer frame is made with light blue squares:  three on each corner.

Partially sewn cornerstone quilt block

Partially sewn cornerstone quilt block

Sew the squares together across the row for rows 1, 2, 5 and 6.  For the rows 3 and 4 in the middle you’ll need to sew together the four patch unit on either side of the central square first.  Then you can sew the squares together across the double row.

Sew the rows to each other to complete the quilt block.

Cornerstone quilt suggestion

Cornerstone quilt suggestion

For a quilt suggestion, I have just shown nine blocks sewn together in three rows of three.

I rather like the way that the light blue crosses form between the blocks, so I didn’t feel that I wanted to use sashing or an alternate block.

Thanks for visiting my blog.

I hope to see you again soon.

Rose

Here’s the video:

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Comments

  1. HI Rose, this is very different and lovely. Nice to see a pretty change such as this. I hope you have a wonderful weekend.