Assuming by “remains” you mean ashes, several things come to mind.
If you grind them really fine you can use them as pigment to paint a
grisaille portrait of her husband. That would be nice as a brooch or
You could mix them with transparent resin and cast a bunch of cabs
or beads for a necklace or bracelet, or even a full parure.
You could make a necklace of closed containers–cubes, spheres,
cylinders, ovoids, etc.–each of which contains a portion of the
You could make a tubular bangle bracelet filled with a portion of
There are often bits of charred bone among the ashes. Sieved out
these can be sealed in spheres to make maracas.
You could replace the pebbles inside a rain stick with the ashes.
Should make a kind of gentle shooshing sound.
If we’re not talking about cremains, in Tibet they make a lot of
interesting things out of human bones.