Great object. This is like one of those objects people seem seem to assume only Topmod, or other specialized, solid-manifold modeling software can produce. Really elegant and cool design, and good choice of material. Do I see an opacity map in some parts, or are they just reflections?
That is reflections. HDRI environment map. For this object I started with a sphere and then created shape from selection. Bridged some faces with tapering and then twisted and smoothed.