6.66 Ct. Blue Sapphire from Africa

This transparent 6.66 carat cushion shape blue sapphire presents precise lapidary proportions, measuring 11.77 x 8.98 x 6.11 mm, with a length to width ratio of approximately 1.31 and a depth of approximately 59 percent, dimensions that confer strong presence on the finger while maintaining wearable proportions. The stone is faceted in a mixed brilliant cut, a deliberate combination of a brilliant style crown and a modified pavilion, engineered to maximize scintillation and light return while concentrating color in the body of the gem. Facet junctions display excellent symmetry and an excellent polish, producing crisp facet mirrors and lively facet contrast under a range of lighting environments. Clarity is graded as very slightly included at eye level, indicating minute internal features that do not detract from transparency or overall visual performance, and which in fact add to the stone character when viewed by a connoisseur. Color reads as medium intensity blue with balanced saturation and a slightly cool undertone, a tone that allows the sapphire to register as distinctly blue versus overly dark. Critically for collectors and designers, this sapphire is natural and contains no enhancement, an important attribute that preserves original crystal chemistry and untreated color behavior. Origin is Africa, and the combination of untreated color, mixed brilliant cutting, and precise proportions makes this sapphire especially suitable as a center stone for a custom three stone or halo engagement ring, a signet style mounting, or a museum quality pendant, with recommended prong or low bezel settings to showcase the pavilion development and protect the cushion cut corners.

At The Natural Sapphire Company we emphasize the heritage of sapphires as both ceremonial and practical gems, and this piece connects directly to that tradition. Historically sapphires have been favored for signet rings, devotional jewelry, and regalia because their toughness and color conveyed protection, wisdom, and status, and this African cushion sapphire carries that same lineage in a modern gem form. The mixed brilliant faceting echoes traditional cutting aims to enhance both sparkle and color saturation, techniques that have been refined but remain continuous with generations of cutters who prized balance between light performance and hue. For the technically minded buyer who values provenance, cut geometry, and untreated material, this sapphire offers a clear statement of craftsmanship and heritage, ready to be set into a design that will continue the stone's story for generations.