Mother Nature has all the tricks, doesn't she. Natural bicolour gems always amaze me every time I see them. How do they work, how does that wonderful blending of colours happen? The fact that this is a completely natural phenomenon blows the mind, and they just look so good. This wonderful loose natural Afghan bicolour tourmaline gemstone is devine, it has a soft subtle blending of yellow and green and the superbly cut and polished Emerald Cut design that it has been finished in truly does it justice. This design is particularly good at emphasising the colour of a gem and works very very well in this case. A top shelf gem deserving of the finest jewellery setting.