It looks almost more like a diamond-shaped window with a rocky background moving behind it, if that makes sense. It doesn't feel quite like a rotating 3d object to me, but I can't place what's wrong.
@ashkin It's actually made of sand and magnetic metals (for a desert planet design I'm working on), rather than an actual geode. But I definitely see the wood texture, perhaps I will try some recolors and see if I can get the sand feeling down more visibly?
The texture of it reminds me more of wood than crystal. Perhaps a color change would help.
Looks nice, but it kinda reminds me of a corn of a cob :D
if you think of what it is, i'd love to know! :) its my first attempt at a rotating object.