This the latest try. I did the .3 reflection and .7 refraction, raytracing and shadows on. It's better, but still doesn't look like glass though, and the sand in the bottom is black instead of sandy colour. I rendered on a white background. I put it on black here for you to see. On white the globes aren't very visible.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi