Ametrine is the trade name for bi-colour amethyst; part amethyst, part citrine – see what they did there! In many ways it’s the panda bear of the gemstone world; it only comes from one mine in Bolivia, and given that citrine is effectively amethyst that has been heated, what you are looking for are amethyst crystals which have been partly heated by processes in the earth and partly not. Then you want to find a nice clean crystal that will co-operate and give you an nice gem with a balance of both colours. In the past, the classic cut was a step-cut rectangle with an ideal proportion of 50/50 amethyst and citrine. These days, however, all kinds of arrangements are common. I’ve seen ones where the cut-off runs diagonally through the stone, and fancy cuts and concave cuts scatter the light and create all kinds of interesting colours and effects. I have for sale just a few of the classic rectangular step cuts, with good proportions and also a few concave cuts. Concave cutting is interesting as it involves cutting conical facets with 3 dimensions, so that each facet has depth as well as length and breadth. This means that more light is refracted and the stone appears more brilliant. In addition, the facets create a fascinating effect. To shop the range, click here.
Below, two perfectly simple, perfectly elegant rings, the settings a perfect foil for the beautiful stones. Left; Stone Fever Jewelry’s ametrine and sterling silver ring at $275 and EVGAD’s concave cut ametrine and sterling silver ring at £89