4.13 Ct. Bi Color / Parti Sapphire from Madagascar

This listing describes one transparent 4.13 carat cushion shape bi color parti sapphire from Madagascar, offered by The Natural Sapphire Company. The stone measures 9.88 by 8.71 by 5.23 mm and is faceted with a mixed brilliant cutting style. Clarity is graded very very slightly included, evaluated at eye level, producing minimal impact on transparency. Color intensity is described as intense, and the stone has an excellent polish. The sapphire has been heat treated, a stable and commonly accepted enhancement that improves color while preserving natural crystal structure and durability.

In comparison to more common gemstones, this sapphire exhibits a different balance of brilliance and color. Diamonds display the highest dispersion and fire, but sapphires, with a refractive index typically around 1.76 to 1.77, offer strong, focused light return and notable scintillation when well cut. The mixed brilliant cut used here combines the depth and color saturation of step style facets with the sparkle of brilliant facets, producing lively flashes without sacrificing the parti color contrast. Against gems such as aquamarine or topaz, which often show paler hues and a glassier light response, this sapphire stands out for its intense saturation and dynamic bi color zoning that creates depth and movement as the stone is viewed from different angles. Compared with emeralds, which can appear velvety due to common inclusions, this sapphire’s very very slight inclusions allow superior light transmission and cleaner brilliance, while its hardness near 9 on the Mohs scale provides greater resistance to wear. The combination of substantial carat weight, cushion proportions, precise mixed brilliant faceting, intense parti coloration, and excellent polish makes this Madagascar sapphire distinct in both visual presence and practical suitability for fine jewellery.