Donald W. Grace’s ‘Largest 8-Vertex Polyhedron’, discovered in 1962 using a Burroughs 220 computer, which maximizes the volume for a polyhedron with eight vertices inscribed in a unit sphere. This version is a wireframe with loop to hang as an ornament, pendant, earrings, etc.

Related Blender project: https://github.com/circuitcat/Grace-Polyhedron-Blender

Thanks to Matt Parker and Standup Maths for the YouTube video that inspired me to make this 3d model!
https://www.youtube.com/watch?v=XZy3rXr2yeM&t=387s