A diamond of a modern Trilliant cut [with triangular/tripolar symmetry].

Specifications:

Topology: Quads only.

Units: metric.

Bounding box dimensions (approx): 3.5 x 3.1 x 1.9 cm.

Material: procedural PBR Diamond material, which uses real physical Index Of Refraction of a Diamond. Based on Principled shader, thus compatible with modern PBR renderers.

UV map unwrapped.

HDRi environment map (Studio Small 01, 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.