5.96 Ct. Ametrine from Ceylon (Sri Lanka)

This specimen is a transparent bi color ametrine, weighing 5.96 carat, cut in a classic emerald cut. The dimensions are 13.87 x 7.75 x 6.83 millimeters, the clarity grade is eye clean when evaluated at eye level, the color intensity is intense, and the polish is excellent. The stone was heat treated to enhance and stabilize its color properties, and its reported origin is Ceylon Sri Lanka. These objective parameters combine to deliver a gemstone that reads as both technically refined and visually compelling, offering reliable performance under loupe and unaided inspection alike. The Natural Gemstone Company presents this ametrine as an example of disciplined cutting and material selection, chosen for its transparency and the purity of its color separation between the purple and golden zones.

The geometric faceting of the emerald cut is central to the stone s optical behavior, using parallel step facets on the crown and pavilion to generate directional light play and a hall of mirrors effect. The large rectangular table provides a broad aperture through which the internal color zoning is observed, while the graduated step facets on the crown act as optical planes that break and relay light in controlled flashes. On the pavilion, the stepped facets are proportioned to maximize internal reflection for the refractive index range typical of quartz, reducing windowing and preserving saturation across the bi color interface. The cutter has oriented the step sequence to run along the long axis of the outline, which sharpens the perceived division between the amethyst and citrine zones and enhances the pleochroic response when the gem is viewed from different angles. Precise facet junctions, consistent facet angles, and a balanced table to depth ratio all contribute to crisp facet reflections, minimal contrast leakage, and a scintillation pattern that reads as structured and architectural rather than chaotic.

From a craftsmanship perspective, the emerald cut geometry employed here emphasizes control and repeatability. The truncated corners typical of the emerald profile preserve structural integrity during cutting and setting, while also providing additional light return via small crown and pavilion corner facets. The excellent polish ensures that each facet plane functions as an efficient mirror, allowing for strong light transmission and return, and the eye clean clarity grade means that the designer s intent in faceting is not obscured by inclusions. Given the heat treatment enhancement, the color zones are stable under normal wear conditions, though the typical thermal sensitivity of quartz suggests avoiding prolonged exposure to extreme temperature changes. For mounting, orienting the stone so the long axis parallels the wearer s finger or the design s principal visual axis will showcase the bifurcated coloration most effectively. Prong settings that protect corners, or a bezel that allows light to enter through the pavilion, will both serve depending on the design language, and a well proportioned setting will preserve the geometric light play engineered into the cut. The Natural Gemstone Company can provide additional data and recommended setting orientations for custom work, to ensure that the stone s step faceting and intense color are presented to their fullest advantage.