what to do about gravity

i have these lenses in my studio and have for many weeks now. i really like them. of course i do i like repeated units and grids. 

i want to make some wall pieces out of them with an image across etched across the surface.

there are many different shapes and colours.

but the problem is gravity. i wish i could just have them sit together like i have them laid out on the table but against the wall. magically.

i am not sure how to hang them or install them.

i tried drilling a small hole in the lenses but this is not easy to do without chipping the hole on the back. I was thinking of making a metal armature to hold them like wire framed glasses but i don't have these skills and have not found anyone who can help me with it yet.

any suggestions? for installing them? making these layout permanent?

i don't want to embed them in cement or plaster.

how ever they hang it need to be slick. and i just can't think of the solution. 

can you?

i might have to put them away for a bit until i can solve this gravity issue.