Barb M,
I sewed all 9 strips of fabric together. You can use any colors you like. Then cut them at a 45 degree angle like how it says to do it on this website...
http://www.angelfire.com/va3/jclane/.../LoneStar.html
Elizabeth A., I don't know how much fabric I used because I used what I had on hand. Anywhere from 5/8 to 1 yard I guess? It really doesn't take that much fabric.
My strips were 42"long and I used 1 strip per color per diamond and there are 8 diamonds. Which means you'll need 8 strips per color.