This Post was originally published at 
the Quilted Fish in 2011. In the mean time I made another quilt with the pattern which you can see below.
Just another word on pinning: I have seen people pin the image below but without a link to the tutorial which led to other people repinning and even blogging about it but wondering how they can construct the quilt. So, to be fair to everyone, if you pin, then please include a link, either to this site or the original. Please be fair, not just for me but also for your fellow quilters. Thank you!
Also, if you don't know the original source, you can always do a google image search :)
Hi everyone,
Let’s get started right away with a nice and easy diamond baby quilt!
This one measures 33x39 inches / 80x96cm and is perfect for that 
little cuddly baby you want to keep warm  - but you can also just make 
it bigger by adding more diamonds to the sides if you prefer.
And don’t be afraid of those diamonds, I show you that you absolutely
 have nothing to fear, we just have to use a bit more pins then we 
usually do :)
Supplies:
*Some large scraps of your choice – I used 12” squares from all 21 prints of Sweet Divinity
*White fabric for the sashing – ¾ yard
*Fabric of your choice for backing – 1 yard (or 1 ¼ yard if you plan on using a directional print) and binding –  ½ yard
*Template for the diamonds
*Pins
*Rotary cutter, cutting mat, and ruler
*Iron
*Your sewing machine
*A bit of time
Steps:
1. Prepare your fabrics and press      nicely.
2. Create the template for your diamonds: First draw a cross on a 
sheet of paper. Measure 4 ¾ inches across and 7¾ inches upright and mark
 the axes of your cross there.
Now, you have to connect those marks to each other and add your seam allowances and you get this:
And if you want your template to be bigger you just add some inches to either side of the cross...
Also, if you don't like constructing your own template, just print out the image up there and either enlarge or shrink it to the size you want. 
3. Lay the template on your      fabric. If you have enough fabric 
chose nice areas of the prints like those big flowers      of Sweet 
Divinity. My diamonds are cut on the bias because I wanted to      
represent the prints as accurately as possible. If you use fabric 
without      directions in their prints then chose to cut your diamonds 
with the edges on the grain (you can also chain piece them that way!).      It will be much easier to piece.
4. Cut out your fabric and make      sure that all your seam 
allowances are correct. I used 35 entire diamonds      and 12 half 
diamonds that were cut horizontally (for the north and south      ends 
of the quilt) and 7 half diamonds that were cut vertically (for the     
 east and west ends of the quilt) . If you have a lot of fabric you can 
     just cut 44 entire diamonds and cut 6 of them in half horizontally 
and 4      of them in half vertically.
5. Cut your white fabric into      sashing strips. Mine are 1” wide. 
If you use a seam      allowance of ¼ “ then your sashing strip should 
be cut 1 ½ “ wide.
6. Lay out your diamonds and      arrange them in an order that you like.
7. Take a picture with your camera      so that you won’t forget your
 order or label little pieces of paper and      stick one to each 
diamond.
8. Take one of your sashing strips      and begin to chain piece your
  diamonds to it. Please make sure that your      diamonds don’t shift 
or  lose their shape by either feeding then into your sewing machine 
with the sashing      strips on top or  pinning the diamonds to the 
sashing strips.
9. Remember to leave enough space      at the end of each strip 
because we  will make a diagonal cut after each      diamond. Repeat 
until you have  either all left or all right, bottom or up sides      of
 the diamonds  pieced to sashing strips. If a half diamond doesn’t have 
     that  specific side because it is sitting at one of the ends of the
 quilt       just leave it.
10. Take the strips and press the      seams to one side. Repeat until all strips and their diamonds are pressed.
11. Now align your ruler to the      edge of the diamonds and cut along 
the diamonds and the attached sashing. You      should now have 35 
diamonds, 5 horizontally cut in half diamonds, and 4      vertically cut
 in half diamonds with sashing attached to one side. 
12. Lay them out in the order you      wanted. You will now have rows that have sashing between them and rows      that don’t. 
13. Now attach the diamonds that      have sashing between them to each 
other. This step is a little tricky      because it involves matching 
diagonally cut seams but don’t worry, with a      bit of precision this 
is really nothing scary. 
14. Take two diamonds that lay next      to each other. You can draw a 
little line with a disappearing marker on      the sashing at the exact 
spot where your seams will meet at one edge.      Alternatively, you can
 stick a pin there or cut a tiny mark with your      scissors. Now match
 that spot to the seam allowance of the diamond next in      line. Pin 
along the sashing using a lot of pins because the diamonds are      cut 
on the bias and are more likely to shift.
  
15. Sew and press your seams to one      side.
16. Take another sashing strip and      pin it to one of the long 
sides of the rows you just created. If a sashing      strip is not long 
enough, piece two together. It is important here that      you pin a 
lot. If you cut your diamonds on the bias your rows will want to      
shift and pinning will prevent this. I usually try to avoid pins 
whenever      possible but it is vital to use them here or you will have
 to undo your      seams because your quilt top will be too wonky to be 
quilted.
17. Sew and press your seams to one      side. 
18. Now comes the most difficult      step! We now have many rows and 
each of them has a sashing strip running      down one side. They now 
need to be connected to each other. Take two of      your rows (that lay
 next to each other) and a ruler. 
 Align the ruler with the seam of each diamond that runs crosswise to the
 sashing you have just sewn on. Mark or pin the spot where the ruler and
 the outer edge of that sashing meet. Let your pin stick out a bit over 
your fabric edge. You should have at least one mark for each diamond.
 19. Now we match those marks on the      sashing of one row to the seams
 of the diamonds on the next row, pin like      crazy (important!) and 
sew them together.
 20. Repeat with all rows and press your seams to      one side. You 
should now have a wonderful quilt top that you can back,      baste, and
 quilt.
21. If you are like me you would      have to learn how to free motion 
quilt first, but I am sure that straight line      quilting would also 
look fabulous on this one! 
22. Enjoy!
And thanks for stopping by!
I made this tutorial, so please don't reproduce, sell or distribute it without my permission. Feel free to pin or share the link with others but please be fair. And please, do share pictures of your quilts made with this tutorial! I would love to see them!
Johanna