I use to crochet with yarn, making afghans and a big bedspread with shams, gave them to the kids. Oldest Daughter loves to crochet and still does. I started a doily but, gave up, My Mom use to crochet doilies all the time. My oldest Sister taught me a long time ago to crochet Granny Squares. Now I just make quilts.
Your pineapple doily is beautiful, I think it could be used on a square or rectangle table also.