This is a project from a filet crochet class I took last year. Not sure why I waited so long to assemble the squares...except for the fact that I really, really hate sewing blocks together. It really didn't take very long to do & I used up all the grey yarn by adding 4 rounds of edging. I was using up some yarns I had on hand which explains the colors and why some colors are only used for 2 blocks. I keep playing around with my camera settings, but haven't gotten the colors to display as accurately as I'd like. I think it looks better in reality than it does in these photos.
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Here's a closeup that shows the solid and open hearts in the pattern. After I finished the class, I went on to make filet crochet valences for my kitchen.