Gotta love Pinterest! Here's some ideas - if you throw enough out there, something might stick, right?!!
I kind of got excited over these, since you could combine colored glass or your tiles if any are left over.
Then I went back to the orb idea. Texture might be nice, or again add color or tiles.
But.... when I saw this shot of your pool and area with the steps, I'm now wondering if something solid by the steps is a mistake. With the tight space and all the great windows, do you want to break the clean lines of the pool?
So that brings me back to something with thin, cleaner lines to disappear and not take any attention away from your soon-to-be gorgeous pool.
In a silver finish to disappear. The one on the right is too busy for me. Your metal working guy might have the best ideas.
These would definitely be minimalist and disappear.
That's it for this backseat or armchair designer!
I can't wait to see what you eventually create!