Penelope, you may want to try this method; Once you've chosen your fabric, cut as many diamonds as you'll need out of freezer paper, iron this to the RIGHT side of your fabric shiny side of the freezer paper down, cut these diamonds out leaving approximately 1/4" seam allowance, pin the diamonds in place then using the freezer paper template as a guideline, tuck the seam allowance under as you stitch, then just pull the freezer paper off. Let us know what you decide and please post a picture when it's finished!