This is block 7 in Susan’s stars and pinwheels quilt-along, called Expanding Star.
https://desertskyquilts.wordpress.com/2015/11/20/stars-and-pinwheels-qal-expanding-star/
I’m using these blocks-of-the-month to make a different project each month rather than saving them for a quilt. This month, I reduced the block size to 8 inches (unfinished) and made three of them to incorporate in a table mat for a special table in my living room. I fussy-cut three designs from a Christmas panel and added some festive fabric to make the red diamonds.
I bought the vintage sewing table in an antique store several years ago and it gets constant use as a table for sewing, eating, watching TV, working with photographs, writing notes and cards, and is the regular Sunday dinner table for my reclusive 16-year-old grandson. I keep a mat on it at all times
This is an easy block which has a good secondary design.