Uncut Diamond- $1.3 Million/Kg

Considering that this isn’t one of those stones that you randomly find lying around and the high costs involved in its evacuation, diamonds cost an arm and a leg. Don’t be fooled by its rough appearance; the edges of this precious stone are a significant determiner of its pricing.

An uncut diamond piece attracts a fortune in its raw form, obtained from the smoothening out process, which yields smaller fragments that can sell separately. No matter how small the size, this stone is a sure money-maker, hence the “girl’s best friend” reference.