Glass / Crystal Shader

Hello everyone,
I have two cubes in a scene shown below. I would like the first cube to have a green glass-like appearance, similar to the referenced photo shown below. The green cube has a standard transparent material attached to it. While the transparency does work, there are parts of the cube where it looks more opaque than translucent. I would also like to include a shadow that resembles that to the glass shadow. Are there any demos that showcase this effect? Thanks in advance.

l
goal

Can check out this video on shaders. You’ll need one that is glass like.

Thanks for the response.