6.57 Ct. Bi Color Ametrine from Ceylon (Sri Lanka)

This 6.57 carat emerald cut bi color ametrine from Ceylon Sri Lanka is precision faceted to exacting proportions, measuring 11.93 by 9.52 by 8.33 mm, with a classic step cut pavilion and truncated corners that define the emerald silhouette. The faceting scheme employs broad step facets on both crown and pavilion, combined with a moderately large table, to create clean, planar flashes of light that emphasize the natural citrine yellow and amethyst purple zoning unique to ametrine. Color intensity is medium, with an even transition between zones that reads as a deliberate, wearable bi color when viewed face up. Clarity is graded very slightly included at eye level, with inclusions that are minor and well positioned so as not to interrupt the large facet planes or the directional color separation. The polish is excellent, producing crisp facet junctions and high surface luster that maximize internal reflections and maintain consistent light return across the table and step facets. No enhancement has been applied, and the material displays the natural crystalline transparency and optical stability associated with fine Sri Lankan gemstones.

The flawless quality I refer to is a synthesis of cutting precision, facet symmetry, and superior polish, rather than an absolute absence of internal features, and this workmanship elevates the visual performance from every viewing angle. The emerald cut's step facets act as mirrors for the bi color boundary, allowing the collector to observe strong hematochrome banding at oblique angles and broad golden flashes when viewed on axis, while side light reveals a saturated purple edge that frames the pavilion. This controlled interplay of color and light creates a dynamic, three dimensional appearance in motion, ideal for open prong or bezel settings that allow light to penetrate the girdle. For clients interested in other traffic in color and fire, opal type is Fire Opal, noted for vivid warm body tones and bright transparency. The Natural Gemstone Company offers this ametrine as an unenhanced, museum quality specimen, ready to be set into a bespoke piece where its technical virtues and refined finish will be fully expressed.