5.78 Ct. Green Sapphire from Madagascar

This cushion shaped green sapphire weighs 5.78 carats and measures 10.54 x 9.91 x 6.42 mm, it has a mixed brilliant cut and an excellent polish, it is transparent with a medium color intensity, and it is graded slightly included when evaluated at eye level, it is unenhanced and originates from Madagascar, and The Natural Sapphire Company presents this stone as a natural, responsibly sourced example of corundum that will appeal to an educated buyer seeking clarity about origin, treatment, and overall gem quality. The cushion outline provides a pleasing face up spread for the carat weight while the mixed brilliant facet arrangement balances large, broad flashes with fine scintillation, a combination that reads as both lively and refined when set into a well proportioned mounting. The absence of heat treatment or other enhancements is a defining attribute for collectors and connoisseurs, it increases the rarity relative to similar looking material that has been modified, and it allows the natural balance of hue and tone from Madagascar to be the primary contributor to the gem aesthetic and value.

When evaluating clarity and cutting, the slightly included clarity grade means that inclusions are present and can be seen to the unaided eye in certain orientations, however they are not so prominent as to materially detract from the gem's transparency or its ability to return light, the stone remains visually transparent and the mixed brilliant cut is designed to conceal or minimize the visibility of internal features while maximizing brilliance. The mixed brilliant cut combines a brilliant style crown with a pavilion that may include both step and brilliant elements, this approach creates contrast and depth, and in this particular specimen the pavilion depth of 6.42 mm supports good light return for the crown dimensions, the excellent polish further enhances facet contrast and allows crisp white flashes and colored reflections to develop across the table and crown facets. The cushion shape softens the geometric effect of the facets, producing a more antique or classic visual character while retaining modern scintillation, and the measured proportions give a satisfying balance of spread, depth, and potential for secure bezel or prong settings.

This sapphire will exhibit a range of visual behaviors under different lighting conditions, in bright natural daylight the medium green color will appear clean and even, with a slightly cool to neutral hue that reads as true green rather than overly yellowed or bluish, direct sunlight and strong directional lighting will produce lively white brilliance and sharp scintillation from the mixed brilliant facets, you will see bright pinpoints of light crossing the table and broad luminous flashes from the larger facets. Under warm incandescent light or candlelight the stone may take on slightly warmer, more olive leaning tones while maintaining strong internal fire, the warmer spectrum will enhance any yellow green components and give a richer, almost honeyed green appearance. Under cool fluorescent or cool LED lighting the stone will lean toward cleaner bluish green tones, and the contrast between bright white flashes and deeper green areas will be more apparent, a noted characteristic of corundum is pleochroism and while green sapphires are typically less strongly dichroic than some other varieties, slight shifts in hue from green to bluish green or yellow green can be observed as you rotate the gem, the mixed brilliant cut amplifies this effect through facet orientation so the viewing experience changes pleasingly with movement.

Beyond its optical performance, the combination of unenhanced natural color, Malagasy provenance, and a conservative clarity grade contributes to the sapphire's lasting value for both collectors and fine jewelry buyers, Madagascar is known for producing a wide range of gem quality sapphires and the geological conditions there yield natural, attractive colors that are sought after in the market, because this stone has not been heat treated it occupies a premium position relative to comparable heated material, buyers often value the documentation of origin and treatment history as part of a long term investment in gemstones. Corundum ranks nine on the Mohs hardness scale which makes this green sapphire suitable for everyday wear in rings and pendants, the slightly included clarity does not compromise structural integrity and can even serve as a fingerprint of natural formation, The Natural Sapphire Company stands behind the stone with transparent information regarding cut, clarity, and origin, we encourage viewing under multiple lighting conditions and we can provide additional images, measurements, and provenance details on request to assist you in assessing how this distinctive, 5.78 carat Madagascar green sapphire will perform in the setting and lighting of your choice.