Looks good to me!
what kind of rocks are those?
Thank you Boxxer. I believe they are slate but don't know for sure. They were picked up at a used equipment store nearby...sweet find!
The three leaning rocks on the left side might remain in position longer if the flat rock you're bracing them with has a side touching the glass. That would stop it from sliding away from the leaning rocks over time.
Alternately, a small flat rock between the glass and the bracing rock to fill the gap (and avoid a point being pushed against the glass) would hold the structure without having to move the group over to the right.
Thank you, Rick. I was planning on siliconing them together which would take care of any movement...I think. Would that be the best option, in your opinion? Any drawbacks to that?