When I was caught in crochet fever, I made quite a few doilies and a couple of card toppers with crochet edge.I used one of those crochet doilies and crochet edge card topper in my first mini sceapbook album.
I should give credit to Leoni from passion for paper who has done a video on adding crochet edge to the card.
The other one that I made using Leoni's lesson is done around an Indigo blu stamp. I will post the photo soon