A good marketing scheme. Turns out "dirt", "poop" and even "brown" diamonds just didn't sell. Who would have guessed?
Faceted gems are odd ducks in the sense that too little color? Meh. Color density too high? It looks like a shiny piece of opaque stuff--shiny because it is faceted and polished. When the color and density are just right (along with the clarity and cut), the reflected and refracted light in the stone will be sparkly and pleasing to the eye (provided the color is). With clear diamonds, the cut is important to cause the light to refract and provide the 'fire' seen in a good and well cut stone. As inclusions and impurities interfere with that optical phenomenon, they often reduce the value of the stone. Exceptions would be rutile crystals contained in stones aligned with the lattice structure to give star effects, 'star' sapphire for one.
From the appearance of that diamond, it might well have a pleasing root beer brown color if cut. At that size, it's on a stone by stone basis, and finding the right buyer.
