4.18 Ct. Bluish Green Sapphire from Madagascar

This transparent 4.18 carat bluish green sapphire is presented in a classical emerald cut, with precise dimensions of 9.49 x 8.22 x 5.59 mm. The step faceting of the crown and pavilion has been executed to emphasize broad, parallel facets and large, open planes, producing the hallmarks of an emerald cut profile, clarity, and refined color zoning. With a clarity grade of very very slightly included, evaluated at eye level, the faceting strategy intentionally yields a clean visual field across the table while allowing small, natural inclusions to remain confined to facet junctions and lower pavilion planes. The medium light color intensity gives the stone a lively, yet restrained presence, and the excellent polish enhances facet contrast and surface brilliance. This sapphire has no enhancement, and its material integrity is consistent with untreated Madagascan sapphires, showing the sort of crystal habit and color distribution typical of that provenance.

From a gemological perspective the emerald cut used here is an ideal choice to present a bluish green bodycolor with subtle internal reflections. The broad table and long step facets allow the eye to read the stone as a single plane of color, with directional flashes emerging from the step arrangement on the pavilion as the stone moves. The relatively shallow to moderate crown height works with the 5.59 mm girdle to offer efficient light return and a pleasing face up appearance, while maintaining the structural advantages of a step cut that minimizes damage risk at the corners. The excellent polish contributes to crisp facet edges, enhancing the geometric interplay between crown and pavilion steps. As a natural, untreated sapphire from Madagascar, this example displays a balanced mixture of blue and green components that can shift slightly toward either hue depending on viewing angle and lighting, creating a subtle color travel that is both collectible and wearable.

For custom jewelry, the emerald cut geometry lends itself to several sophisticated pairings that respect the stone's step faceting and medium light intensity. To reinforce the linear aesthetic, consider tapered baguette side stones in fine white diamonds, cut with tight symmetry and color grade in the G to H range, clarity VS to SI, set in channel or bar settings that mimic the sapphire steps. Small brilliant melee diamonds arranged in a halo can add scintillation without overpowering the central color, while a straight double baguette shoulder reinforces a clean, architectural composition. For contrast, warm yellow sapphires or well matched citrines can be used as accent stones to bring out the green component of the sapphire, especially when set in 18 karat yellow gold, which will impart a vintage inspired warmth. Alternatively, platinum or 18 karat white gold will cool the presentation and emphasize the blue component, offering a contemporary, high contrast look. In terms of mounting, a low four prong or minimal bezel that preserves the pavilion visibility will maximize light entry and maintain the stone proportions and optical characteristics, while a tailored under gallery that tracks the stone pavilion and protects the corners will preserve the integrity of an emerald cut profile. When designing a ring, a setting that keeps the table level with the finger plane will ensure the sapphire sits prominently without overwhelming a delicate hand, as shown in the scale images. At The Natural Sapphire Company we focus on matched facet orientation, metal choice, and accent gem selection to create compositions that both respect the technical nature of the emerald cut sapphire and elevate its inherent color and clarity.