Yes, @kswan & @Bill Kielb, I do want these to break down in nature. I had thought of beeswax, but not vegetable oil. I have vegetable oil. I threw them pretty thick, so I'm not sure how fragile they will be. I'm sure they will chip though.
I will take one of them and do as @oldlady suggested and try to rehydrate it to scrape off the outer slip and bring out the colors.
One of my husbands friends wants his ashes to be sunk, dropped, submerged in a lake, so that is one of the ideas for this. Hopefully I will not need to use them soon.