5.78 Ct. Brownish Green Sapphire from Madagascar

This 5.78 carat cushion shape sapphire from The Natural Sapphire Company presents as a transparent, medium intensity brownish green gemstone, with exact dimensions of 10.54 by 9.91 by 6.42 millimeters, a form factor that reads as substantial and versatile for custom work. The cutter has executed a mixed brilliant faceting scheme, combining a brilliant style crown with a more faceted pavilion geometry to balance scintillation and depth of color. The table is proportioned to present even light return across the sweet spot, while the pavilion depth maintains strong internal reflection without overstating darkening toward the culet, resulting in an optical profile that photographs and performs well in both natural and artificial light. Clarity is graded slightly included at eye level, with small internal features that are localized and do not dominate the gem face, and polish is excellent, producing crisp facet junctions and lively facet windows. The sapphire is untreated, no enhancement, and its origin is Madagascar, which contributes to the gem character and trace element palette that defines its brownish green hue.

From a technical design perspective this sapphire is ideally suited for bespoke jewelry because its cushion outline and nearly equal length and width dimensions provide predictable placement and symmetry in a wide range of settings. The stone sits in a size category that allows for comfortable incorporation as a centerpiece in rings, pendants, and statement earrings without requiring excessive supporting metal, and its depth of 6.42 millimeters gives experienced setters room to design secure prong seats or subtle bezel walls while maintaining optimal light performance. The mixed brilliant cut maximizes scintillation from the crown facets while the pavilion faceting preserves saturation, a combination that can be emphasized by open back settings or slightly closed gallery constructions depending on whether the client prefers brighter sparkle or richer body color. Slight inclusions evaluated at eye level can be strategically oriented toward the girdle or hidden beneath prongs in a ring design, and the cushion silhouette lends itself to four to eight prong settings, low profile bezels, or halo frameworks that increase perceived size without disrupting the gem proportions.

Design considerations that benefit custom fabrication include metal choice and mounting philosophy, because the brownish green color responds differently to warm and cool metals. Yellow gold and rose gold accentuate the brown components and produce a warmer overall palette, while white gold and platinum emphasize the green and create a crisper, more contemporary presentation. For clients seeking maximum brilliance and a modern look, a low eight prong or open tension style will allow light to enter the pavilion freely, showing the mixed brilliant facets to advantage, whereas a classic bezel or half bezel will protect the girdle and corners of the cushion profile for a more wear resistant daily ring. Given the excellent polish and stable facet geometry, this sapphire also performs beautifully in halo compositions, where carefully matched melee can boost visual impact, or as a solitary stone in a bespoke three stone design where side gems can be selected to complement saturation and hue. Mounting recommendations include precise seat cutting to secure the pavilion and crown alignment, radiation of prong heads to avoid light blockage across the table, and consideration of a slightly open gallery to permit cleaning and light access without exposing the stone to unnecessary knocks.

The Natural Sapphire Company presents this Madagascar origin sapphire as a natural, untreated gem with technical attributes that make it a superb candidate for custom jewelry commissions, and our in house artisans can advise on proportion adjustments to optimize finger presence, finger to gem scale, and longevity of the setting. When commissioning a custom piece we suggest discussing preferred metal tone, desired level of protection, and whether you want the design to maximize color or sparkle, because each choice interacts with the stone geometry and the mixed brilliant cut in predictable ways. For clients who appreciate gemology informed craftsmanship this sapphire offers measurable advantages, including a substantial carat weight in a classical cushion format, precise dimensions that simplify mounting templates, and a clarity grade and polish that reduce the need for compromise between aesthetics and structural security. We welcome inquiries through The Natural Sapphire Company to provide lapidary diagrams, setting mockups, and personalized design proposals that will ensure the final piece showcases the inherent character and technical excellence of this brownish green sapphire.