A rare black diamond can suit any project where you might need a pure precious gem.
Diameter - 5.3 cm;
Height - 3.2 cm.
Topology: Quads only.
Material: PBR Black Diamond procedural material, that uses real physical Index Of Refraction value of a real Diamond. Based on Principled shader, thus compatible with modern PBR renderers.
UV map unwrapped for extended use.
HDRi environment map (Blue Grotto, public domain) packed in .blend for more realistic reflections, as well as put into supporting items separately.
All imagery is done via Cycles / Filmic (Base Contrast profile), no post-processing.