Seriously! That is a DIAMOND. An uncut diamond in a symmetrical pyramid shape. What a fantastic example of an raw, straight-from-the earth diamond. This shape is fairly rare (normally raw diamonds are flat triangular macles or gloppy looking dodecahedrons). It is also really clean and refracts light in the way that only a diamond can.
The shape of the setting under the stone mirrors the angle of the diamond perfectly. This hand-fabricated platinum engagement ring sits flat next to the wedding ring with no gap between them.