15.08 Ct. Bluish Green Sapphire from Madagascar

Presented by The Natural Sapphire Company, this extraordinary transparent sapphire is a statement of refined taste and confident elegance, a jewel to be sought by collectors and connoisseurs alike. At 15.08 carats the gem is remarkable for its scale, offering a presence that is at once majestic and approachable, a rare combination in sapphires of this hue and clarity. The asscher octagon shape with its precise step facets creates a disciplined geometry that channels light inward, producing a deep, mesmerising bluish green that reads as both oceanic depth and forest shadow depending on the light. With dimensions of 13.63 by 12.72 by 9.61 millimetres the stone sits with noble proportions that suit a statement ring or a singular pendant, while its excellent polish ensures every facet catches and returns light with calm authority. Evaluated face up, the clarity is very very slightly included, a mark of exceptional transparency for a stone of this size, and the overall colour intensity is vivid, imbuing the gemstone with a saturated, living quality that elevates any setting and any occasion.

The provenance of this sapphire, born of Madagascar, is an intrinsic part of its allure and its value. Madagascar has emerged as one of the world’s most captivating sources of precious corundum, where island geology and time have conspired to produce colours that are distinct from other classic sources. A sapphire carrying the story of Madagascar brings with it a geological pedigree that collectors prize, a narrative of remote rivers and mineral rich host rocks, of artisanal miners and dedicated lapidaries who have coaxed beauty from the earth. This origin imparts a singular character to the bluish green tone, a hue that is often found in Madagascan material and which collectors seek for its rare balance between blue depth and green vitality. Provenance matters in the world of fine gems, and Madagascar’s reputation for yielding uniquely hued sapphires adds a layer of desirability, ensuring that the gem is appreciated both as an object of adornment and as a refined expression of place and story.

We believe in forthrightness about enhancements, and this sapphire has been heat treated, a widely accepted and permanent enhancement that intensifies colour and improves clarity while maintaining the natural integrity of the stone. Heat treatment is a respected tradition in gem craftsmanship, and when combined with the inherent quality of a Madagascan rough of this calibre, the result is a vivid, stable colour that will endure through generations. The asscher octagon cut chosen for this stone demonstrates masterful lapidary skill, it concentrates colour in the pavilion while allowing the table to reveal the gem’s transparency and internal life, making the stone ideal for a refined, architectural setting that celebrates both geometry and colour. At The Natural Sapphire Company we offer bespoke design services to craft settings that honour the gem’s scale and presence, recommendations for precious metal pairings that complement bluish green tones, and guidance on setting styles that protect and showcase a sizable centre stone. Beyond its immediate visual impact, this 15.08 carat asscher octagon sapphire represents an investment in legacy, a piece destined to become an heirloom, a gemstone whose origin, cut and clarity will be admired by future generations as a definitive expression of cultivated taste and careful connoisseurship. Ownership of such a stone signals discernment, it becomes a personal emblem of achievement and aesthetic authority, a rare jewel that speaks in a quiet, very sophisticated voice.