Crystal by PolyToots
© PolyToots
https://sketchfab.com/3d-models/crystals-0499073f160248adb451bf4135e5f50a

Exported into GLTF from Blender for Godot. Textures flipped.

Under CC-By 4.0: https://creativecommons.org/licenses/by/4.0/