This is the initial setup used for the butterfly crystal. A single softbox, Photoflex Q39 (large) overhead at about 32” from the table supplies the light. The white table surface offers some diffuse reflection. The softbox was metered at f/11. Considering the size of our subject, this softbox is giant and offers very soft, almost shadowless light.
This is the back view lit with just the gridded light so you can see how little it contributes. Without direct reflection, shiny metal just doesn't return very much light. This is why we generally light shiny metal with a very large light source, to fill the mostly reflective surface with light.
And lastly, the back view with the overhead light turned back on. There is a big difference when dealing with direct reflection. The overhead light is large enough to ensure some light will be in the family of angles to cause direct reflection, but the gridded light has a very narrow angle of projection, so it can't contribute much of anything, as the angles are all wrong
I have another post or two to share from this tabletop adventure, so we'll be doing some small things for a little while longer.