The rocks and trees in the foremost ground of the painting make me think of the ashlands of Vvardenfell in Morrowind. Dead, spooky, and someplace you'd want to leave as soon as possible. For someone like an adventurer to stumble upon these rainbow croppings of rock after such a wasteland would be absolutely jaw-dropping and welcoming at the same time. Though the ground seems no easier to travel on so it still might be rather foreboding.
Needless to say, the contrast, and beauty of the rainbow-crystal formations, is well done and makes for a lovely addition to your gallery. Well done, once again.
Honestly, so far, out of all your creations, I'd have to (tentatively) say that this is my favorite one. It feels like the border between two planes of reality; it's both one, and the other. I like it imagine it as the rocks growing into the large crystals, I don't know. Taking aspects of a world like ours and a world not so much like ours...you know, high fantasy, planes of immortal creatures and such! Though I guess this kinda plane would be more neutral than good or bad...I don't think you were going with a feeling of good or bad with this plane. I feel like it's meant to inspire awe, or power. But that's only if you're lookin' at it like I am, not just big crystals.