Yellow Gold Rough Diamond Necklace This collection is all about the rough Brown Diamond being the focus of the jewel, as the simple lines are created around the Diamond to make it stand out, 9 or 18 carat Yellow Gold gives it a different tint to the stone. The 9kt being a little red in colour makes gives a slight dipper tint to the Diamond, the 18kt having a yellow tone gives a brighter look. Since this rough diamond is used exactly how it was found in nature, each stone will vary in size and colour. Each Diamond is unique so your jewel will be a one off. The Necklace is a simple design; the diamond sits beautifully on your décolleté area, charming and elegant to look at.