41.23 Ct. Bi Color Ametrine from Brazil

This listing presents a transparent 41.23 carat emerald cut shape bi color ametrine, with precise dimensions of 23.60 x 20.30 x 13.19 mm, faceted and rendered as a fantasy cut 3d design, clarity grade eye clean as evaluated at eye level, intense color intensity and an excellent polish, heat treated for color stability and originating from Brazil. The piece was selected and finished by The Natural Gemstone Company for collectors and designers who value technical execution and material provenance, combining the classical geometry of an emerald outline with inventive three dimensional faceting to maximize internal light performance.

The cutting approach pairs a broad, flat table and restrained step crown typical of an emerald cut outline, with an engineered fantasy pavilion and modified crown facets that create multiple internal light corridors and finely scaled scintillation. The modified steps and bevels around the girdle produce crisp facet junctions, and the excellent polish yields mirror like facet planes, allowing specular reflections to travel cleanly from pavilion to table. This construction preserves the strong, eye clean transparency of the quartz based ametrine, and the careful facet angles maintain balanced return of light while emphasizing the bi color zonation between violet amethyst tones and golden citrine tones. The result is a heavy, well proportioned gem that shows even facet symmetry, minimal windowing, and a controlled brilliance that benefits from the fantasy cut enhancements.

Under different lighting conditions this ametrine displays predictable and distinctive behavior. In bright natural daylight the bi color zoning reads with high contrast, with cooler purples appearing saturated in the deeper pavilion zones and warm golden ambers dominating the crown and table areas, producing a clear bicolor split that is easily legible face up. Under warm incandescent or halogen light the golden component intensifies, giving the gem a richer citrine appearance, while cool white LEDs emphasize the purple component for a crisper dichroic effect. Directional spot lighting or pin light will activate the fantasy pavilion, producing animated flashes and internal kaleidoscopic reflections, whereas diffuse light will soften the transition zones and present a more blended, velvety color shift. When set as a ring the proportions and depth produce strong face up color and dynamic movement as the wearer pivots, making this specimen an expressive example of technical cutting and natural bicolor quartz from Brazil.