I, as well, am sorry for your loss. Time does heal ... and keeping mementos is, in my opinion, a wonderful way to keep a fond memory close. Depending upon the stone, you may not want to allow them to be heated, which is necessary for any type of soldering or brazing. Such is normally done prior to setting the stone. What you can do, and quite easily, is to cut the posts off and use jeweler's epoxy to affix cufflink backs. These are available in a wide variety of qualities ranging from "metal" (?.?) to 18kt gold. You'll pay under $1 for the "metal" and from $75 to $200 per pair for the 18kt backs. Jeweler's epoxy is special. Unlike most epoxies, it does not dry to a rock-hard consistency as, for example, krazy glue. It has an ever-so-slight flex characteristic. This tends to keep the glued piece from cracking off when the jewelry receives a shock - as all pieces eventually must. You can purchase the 18kt backs at Myron Toback (MyronToback.com) on 47th Street in NYC. If you want "metal", just e-m me and I'll give you whatever you need in 'silver' or 'gold'. We use them for the jewelry classes I teach during the Summer. At Myrons, #283 is my personal favorite Myron Toback jewelry findings
but, as with all 'real' findings, it does need heating. Another idea: You might (might
) be able to bend the posts into a loop and attach a chain with metal disc as a cufflink back. It depends upon the hardness of the post.