Thank you! For the life of me I can't remember how I modeled them lol it was a bit of a while ago. I think I started with a cube with quad polygons and pulled it around until it looked like this (those three crystals are copies of each other twisted around hehe). I used Blender! and I had to be fancy with both the glassy transmissive shader with dispersion effect and the textured fog. All of those take forever to render though things have gotten a bit better lately. Seriously the fog makes it go from a render that takes like 15 minutes to 2 hours or something, and even then it can be noisy. I just wanted it there though, definitely not recommended if you wanna make animations.