Time to look at some basics.
Light sources are very important. Where are they?
There's one behind the clouds, but it's sending mixed signals. The light rays on the far right extend into the foreground. The rays from the other two cloud holes don't agree. The holes are nearer, but the rays strike in the background. This produces visual confusion.
How about the lightning? It usually produces intense light. But the crystal isn't illuminated by that light, nor does it show any reflections from that light. Instead, the near side of the crystal is dark.
And perhaps the crystal itself should be a source of light...
Just some basic observations.
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