11.52 Ct. Blue Sapphire from Thailand

This cushion shaped blue sapphire weighs 11.52 carat and measures 16.34 x 14.43 x 4.83 mm, offering a substantial presence that is well suited to a dominant center stone application. The cutter has applied a mixed brilliant cut, combining a brilliant facet arrangement on the crown with more elongated step influenced facets on the pavilion, creating a balance between scintillation and depth of color. The overall outline retains the characteristic pillow silhouette of a classic cushion, with softly rounded corners and a broad table that maximizes the visible color field. Proportions yield a depth ratio of approximately 31.4 percent, which contributes to an elegant profile on the finger while maintaining a comfortable girdle thickness that facilitates a variety of setting styles. The excellent polish is evident in the strong facet junctions and crisp facet planes, which allows for clear light transmission and controlled return, especially when the stone is set in open backed mounting styles.

Optically the sapphire presents a vivid color intensity, a rich saturated blue that leans to a pure spectrum rather than heavy inking or gray modifying tones, which is a prized attribute for collectors and connoisseurs. Clarity is graded slightly included when evaluated at eye level, and the stone exhibits natural internal features that are consistent with corundum from this origin, including fine silk and discrete crystal inclusions that subtly diffuse light without dominating the visual experience. These internal characteristics can act as identifiers of natural origin and contribute to the gemological narrative of the stone, while the heat treated enhancement has been applied to optimize color uniformity and to enhance the vivid saturation without compromising the transparency. The combination of treatment, clarity and cutting yields a sapphire that displays lively flashes from the crown facets and a deep, saturated face up color, making it attractive for both collectors seeking natural character and designers seeking predictable performance in finished jewellery. The origin of this sapphire is Thailand, a source known for producing material with strong blue saturation and stable color distribution, and The Natural Sapphire Company stands behind the gemological integrity of this piece.

From a design and versatility perspective this sapphire is exceptionally adaptable, translating equally well into casual and formal settings. In a daytime or casual context the stone sits well as a single center for a bezel or low profile four prong mount, where the substantial table and moderate depth provide confident presence without excessive height, easing wearability for everyday use. For formal or statement pieces the vivid saturation and significant carat weight respond beautifully to halo designs and three stone interpretations, where smaller brilliant cut diamonds or accent sapphires can be used to enhance perceived size and to introduce contrast and sparkle. The cushion outline also lends itself to vintage inspired settings that emphasize the soft corners and broad face up area, or to contemporary bespoke mounts that incorporate open galleries to allow light ingress and to showcase the excellent polish and mixed facet architecture. Metal choices will influence apparent color, with platinum and white gold reinforcing cool blue tones, and yellow or rose gold introducing a warmer contrast that can make the blue appear more vivid to the eye. For bespoke commissions The Natural Sapphire Company can advise on prong depth, recommended bezel lip dimensions and pavilion clearance to ensure the 4.83 mm depth is accommodated without stressing the girdle, and to preserve the stone integrity while maximizing aesthetic impact.