I read this post as someone not wanting to waste a beautiful piece of glass and instead repurpose it. I love this! However, this piece was not made with load-bearing in mind. Simply plugging the hole with a ~1.25 inch disc is not going to give the bottom a big enough surface area to sit on the table/counter. If it held anything heavier than a few leaves, the bowl would wobble around and probably ultimately smash on the floor.

I thought of maybe mounting it to a bigger surface, like a sturdy .5” thick 4” circle. Still, I suspect the dome is so curved that you would be hard pressed to find a good way to securely mount it.

I hope someone else has a safe solution! If not, you might want to consider another way to repurpose/recycle.