6.03 Ct. Greyish Blue Sapphire from Madagascar

This C. Dunaigre certified greenish blue, greyish blue sapphire, weighing 6.03 carats and cut in a classic emerald shape, represents a refined combination of color, clarity, and proportion that will appeal to the educated gemstone buyer. The stone’s dimensions, 10.22 by 9.09 by 6.44 millimeters, give it a commanding presence in a ring or pendant while maintaining balanced proportions that preserve both brilliance and elegance. The emerald cut, with its broad step facets and open table, accentuates the sapphire’s transparency and allows the eye to appreciate even, saturated color rather than the scattered brilliance of brilliant cuts. This sapphire exhibits intense color intensity, a restrained greyish-blue leaning toward greenish-blue, a tone that is subtle and sophisticated rather than overtly saturated. The gem has been evaluated as very slightly included at eye level, meaning that inclusions are minimal and do not compromise its overall transparency or visual appeal. An excellent polish ensures crisp facet junctions and smooth surfaces that reflect light with clarity, emphasizing the stone’s cool, serene palette and enhancing its apparent size and depth.

From a gemological standpoint, the sapphire is a durable and practical choice. As corundum, sapphire scores a nine on the Mohs scale, making it highly resistant to scratching and suitable for everyday wear when set thoughtfully. The stone has been heat treated, a widely accepted and historically established enhancement method used to improve color uniformity and to reduce or remove minor inclusions. Heat treatment in sapphires is stable and permanent when properly applied; it does not require ongoing maintenance beyond normal jewelry care, and it is fully disclosed in the accompanying C. Dunaigre certificate. For collectors and buyers who value transparency, the combination of independent certification, disclosed treatment, and clear grading information provides the level of assurance needed to assess value. The Madagascar origin is noteworthy: Madagascar is recognized for producing a broad spectrum of high-quality sapphires, including rarer greyish, teal, and green-leaning blue tones that differ from the classic cornflower blue of Kashmir or the deeper velvety blues of Sri Lanka and Myanmar. This geographic origin can contribute to distinct color characteristics and market interest because Madagascan sapphires combine attractive color range with relatively recent availability in larger sizes.

The aesthetic and long-term investment qualities of this stone are compelling. Its intense yet nuanced greenish-blue hue reads as versatile against both white and yellow metals, creating an understated but unmistakable presence. The emerald cut’s linear geometry offers a timeless silhouette that flatters a variety of settings, from minimalist solitaire rings to more elaborate halo or three-stone designs. Because the gem is transparent with very slight inclusions, it will retain crisp, open windows of color under different lighting conditions, giving it a consistent, reliable appearance that will continue to captivate for years. The excellent polish preserves facet definition and surface luster, which are critical for maintaining visual appeal over time; minor wear can be polished professionally if needed, restoring the gemstone’s original finish without loss to the material. For those considering this sapphire as an heirloom or an investment piece, the combination of carat weight, attractive and uncommon color, clean eye-level clarity, and formal certification by C. Dunaigre all support a lasting value proposition.

The Natural Sapphire Company is pleased to present this elegant Madagascan emerald-cut sapphire to clients who appreciate informed buying and enduring style. Whether you are commissioning a bespoke ring or adding to a collection, this 6.03 carat stone offers both the technical qualities and the aesthetic subtleties that discerning buyers seek. Its stability, durability, and heat-treated permanence mean it will reliably showcase its cool, intense color through daily wear and special occasions alike. With proper setting and routine care—gentle cleaning with mild soap, warm water, and a soft brush, periodic professional inspections for the mounting, and avoidance of strong acids and prolonged ultrasonic exposure unless cleared by a gem professional—this sapphire will continue to reward the wearer with the same quiet luminosity and depth that make it remarkable today.