5.19 Ct. Blue Sapphire from Madagascar

This GIA certified Deep Blue sapphire presented by The Natural Sapphire Company is a 5.19 carat oval measuring 11.41 x 7.88 x 6.60 mm, cut in a mixed brilliant configuration, clarity graded very slightly included at eye level, vivid in color intensity, with an excellent polish, and originating from Madagascar, with no enhancement reported. The mixed brilliant cut combines a brilliant facet arrangement on the crown with a controlled pavilion design, the result being a balance between scintillation and secure light return. With an average diameter near 9.65 mm and a depth of 6.60 mm, the stone displays a depth percentage of approximately 68 percent, a proportion that has been deliberately retained to intensify color saturation while preserving overall light performance. The cutter optimized crown to pavilion relationships to work with corundum s refractive index, ensuring that the pavilion facet angles lie close to the critical angle for sapphire, maximizing internal reflection and minimizing light leakage while the excellent polish maintains clean facet junctions and crisp facet planes.

Technically, the mixed brilliant architecture enhances the sapphire s inherent optical properties by directing light through a sequence of controlled reflections and small scale dispersive flashes. The brilliant style crown facets on this oval create broad, lively flash patterns and frequent scintillation when the gem is moved, while the modified pavilion facets act as reflectors that return light through the crown in pleasing, evenly distributed pulses. Because the sapphire is natural and untreated, the vivid blue hue is the result of intrinsic trace element distribution, and the cutting strategy takes advantage of the slightly deeper pavilion to concentrate chroma without producing excessive contrast that would mask brilliance. The very slightly included clarity grade means that inclusions are minimal and generally confined to positions that do not interrupt the primary light pathways, preserving both transparency and the gem s ability to display strong internal contrast and lively surface brilliance. For the buyer seeking a gemstone where precise faceting, measured proportions, and superior polish combine to maximize color and light, this Madagascar sapphire from The Natural Sapphire Company exemplifies a technical approach to cutting that accentuates depth of color, optimized light return, and consistent scintillation.