Made an outline selection material though it does rely on normals to display the outline which makes it messy anywhere the mesh has sharp edges.

Made a little scanner in Godot. Because I had done shaders like the fading light trails I figured I could do the fading phosphor like in a radar display.

This is called an emerald cut so I added a tint to the shader for it

Added rose cut to the types of gems you can generate

Some potential here with parallax offset sampling a voronoi texture.

Might want to layer with the cubemap variant I did before