4.30 Ct. Emerald from Zambia

This transparent emerald weighs 4.30 carats, and measures 10.24 by 10.01 by 6.73 millimeters, presented in a cushion outline with a balanced table and softly rounded corners. The cutter employed a mixed brilliant faceting scheme, integrating a faceted crown with a modified brilliant array over a pavilion that combines both step and brilliant facet sets, to maximize both color saturation and light return. Clarity is graded as slightly included when examined at eye level, which is consistent with natural emerald material from primary deposits, and the gem displays vivid color intensity with an excellent polish. Enhancement conforms to standard practice for emeralds, improving apparent clarity while preserving natural body color. The provenance is Zambia, and this stone is offered by The Natural Emerald Company, with documentation of origin and enhancement noted in our inventory records.

The mixed brilliant cut in this example was executed to emphasize internal color zoning control and to mitigate light leakage through strategic pavilion depth and facet angles. The gem exhibits a total depth of approximately 66.5 percent relative to average diameter, a proportion that favors depth of tone without sacrificing face up brilliance. The crown displays a practical table size that allows for distinct windowing of the underlying color, while the pavilion facets are aligned to produce concentrated flashes, enhancing scintillation during movement. Facet junctions are crisp and symmetry is consistent across the girdle, evidence of skilled preform planning and cutting. Slight inclusions are oriented and minimized by facet placement, they do not materially interrupt the path of reflected light, and in many orientations they serve to modestly diffuse highlight contrast, softening the stone in a way that is visually appealing to connoisseurs.

In hue and tone this Zambian emerald reads as a pure green with a subtle bluish secondary tone, and a medium deep to deep tone that registers as vivid saturation in gemological terms. Compared to classic Colombian emeralds, which often present a slightly lighter, more bluish green with a velvety transparency and a distinctive garden variety of internal features, this material carries a more saturated, slightly cooler core and a crisper face up appearance. Compared to Brazilian emeralds, which commonly lean toward a greener yellow cast with lighter tone, this Zambian example is distinctly deeper and more saturated, exhibiting the fuller chroma that collectors prize. Compared to Ethiopian material, which can show a brighter, greener yellow tendency and variable saturation, the present stone is more consistent in tone and richer in chroma, maintaining a stable, vivid color across various lighting conditions. The net effect is a stone that reads as immediately intense yet controlled, offering the deep, cool green typically associated with Zambian deposits while retaining the transparency and brilliance appreciated by fine jewelry standards.

For setting and valuation considerations the combination of 4.30 carats, cushion shape, vivid color intensity, and excellent polish positions this emerald in a premium bracket for Zambian material. The slightly included clarity grade means that a well conceived mounting can both protect vulnerable facets and permit optimal viewing of the color field, candidates include a low profile bezel for daily wear, or a halo with carefully matched side stones to increase perceived size while maintaining color integrity. Standard enhancement should be noted for long term care, as routine maintenance includes periodic inspection and possible reconditioning of surface treated fissures, to preserve visual performance. At The Natural Emerald Company we recommend mounting practices that respect the facet geometry and pavilion angles, avoiding extreme elevation that could expose the pavilion girdle to knocks, and advising settings that allow light to enter the crown unobstructed to capitalize on the mixed brilliant design. This stone will appeal to technically minded buyers who value precise cut proportions, consistent vivid hue, and a documented Zambian origin.