7.25 Ct. Blue Sapphire from Thailand

This 7.25 carat oval blue sapphire presents precise dimensions of 14.62 x 9.49 x 5.33 mm, a balance of length and width that reads as an elegant elongated oval, and a pavilion depth that supports optimal light return. Cut to a mixed brilliant scheme, the crown employs a series of star and kite facets that transition into a faceted pavilion designed to maximize both scintillation and face up color, while the girdle has been proportioned to facilitate secure setting without unnecessary loss of weight. The mixed brilliant strategy here pairs a larger table with a well articulated pavilion, creating a controlled interplay between broad flash and pavilion mediated brilliance, this is particularly effective for sapphires where color distribution must be preserved. Polish is graded excellent, the facet junctions are crisp and meet to consistently aligned facet intersections, and overall symmetry is near ideal, attributes that contribute directly to measured light performance and to the visual integrity of the stone once set.

Color is evaluated as intense, a saturation grade that places this sapphire in a desirable zone for deep blue gems, with hue leaning to a pure blue with minimal secondary modifiers, and with evenness of tone across the table that avoids disruptive zoning in normal viewing positions. The slightly included clarity grade, assessed at eye level, indicates small internal features that do not materially interfere with brilliance or durability, and which are often located in positions that become visually absorbed into the depth of color when mounted. The stone exhibits the typical pleochroic behavior of corundum, and the cutter has aligned the pavilion and crown to present the most favorable face up hue and saturation, reducing the visibility of any internal characteristics. This sapphire has undergone standardized heat enhancement, a stable and permanent treatment applied in Thailand to improve color saturation and crystal clarity, a practice that is widely accepted in the trade when fully disclosed and executed with controlled parameters, and one that retains the structural integrity and natural origin of the material.

From a craftsmanship and design perspective this sapphire is well suited to become a centerpiece for a fine jewelry commission, the proportions supporting both high profile and low profile settings depending on wearer preference, and the mixed brilliant cut being versatile enough to read as both modern and classic. For ring applications the 5.33 mm depth is substantial enough to allow for secure prong or bezel mountings without compromising the gem face measurement, and for pendants or brooches the table dimensions produce a commanding visual presence. Metal recommendations include platinum 950 or 18 carat gold in yellow or rose to complement the warm undertone of deep blue, while a white metal setting can emphasize blue saturation and perceived brightness. The mechanical stability of sapphire, rated high on the Mohs scale, combined with the excellent polish and clean facet junctions, means the stone will respond well to routine servicing, such as professional cleaning, recutting or re faceting if a future design change is desired, and that it can be integrated into complex halo or multi stone arrangements without undue risk.

At The Natural Sapphire Company we regard this sapphire as an ideal candidate for a generational heirloom, the technical qualities that define its long term value being its intact natural origin with disclosed heat treatment, robust carat weight, precise mixed brilliant cutting that preserves both color and light return, and the excellent polish and symmetry that will allow the stone to endure multiple settings and restorations. Heirloom status relies not only on intrinsic gem quality but on documentation, care, and a framework for provenance, and we provide comprehensive documentation of origin, treatment and measurements to accompany the stone. With proper care the corundum crystal will retain both appearance and structural soundness for decades, and the stone can be reset, resized or re imagined by skilled artisans to suit the tastes of successive generations. For collectors and clients seeking a technically excellent sapphire that combines optical performance, durable material properties, and full disclosure from a reputable source, this 7.25 carat Thai blue sapphire from The Natural Sapphire Company represents an enduring choice that will form the heart of a family legacy.