Star-of-David Tetrahedron

Many years ago I made this design by soldering together thin welding rods. It has the Star-of-David (Jewish star) on the four faces of a tetrahedron, touching at six points. It can sit flat on a table or hang from one of the touching points. Now I have made it for 3D printing in two sizes in a variety of materials. It could be modified for earrings if anyone were interested. There is also a mathematical aspect to the Star of David, since it is the root system of a type G2 simple Lie algebra.