IMHO this is more reasonable than keeping a loved one's ashes displayed prominently in a container on a mantel. It provides a single small and beautiful gem that commemorates a person's existence. Some people carry cremains all over the country with them. That's creepy. Too bad the diamond thing is so expensive.
If others are creeped out by it, you never have to tell them the significance of that diamond.
Lucretia's idea of ceramics has it's downside. Image a couple of generations from now when the ice cream bowl and beer mug get dumped for $0.25 at a garage sale! Poor Bluesman!