What a good idea from your husband, so that you can enjoy your jewelry and quilting together.
You might consider any of the quilt patterns where there is a focus block or fussy cut area.
Use a plainer fabric, and then pin your brooch in place, as the focus.
As for the actual pattern ... consider what your most favourite is, and see if it would work!
One thing to consider will be the weight the brooches will create, and how to "strengthen" your quilt, so the weight does not pull and distort. Of course, that all depends on how big and weighty they may be. Yours may be little ones that would not cause the problem.
Last edited by QuiltE; 12-28-2018 at 10:51 AM.