Materials: all procedural PBR, based on Principled shader, thus widely compatible with modern PBR renderers. Real Crystal Index of Refraction applied. All bumps are done mathematically, no texture files (raster images) used.
All objects of the model are properly parented to each other and grouped into single Collection.
UV maps unwrapped.
HDRi environment map (Blue Grotto, public domain) packed in .blend for more realistic reflections, as well as put into supporting items separately. Additional looks with different HDRi maps are available in imagery (see comment in bottom right corner of the pictures).
All imagery is done via Cycles / Filmic, no post-processing.