9.37 Ct. Bi Color / Parti Cabochon Sapphire from Burma (Myanmar)

One beautiful opaque 9.37 carat oval shape bi color parti sapphire, measuring 13.55 x 12.24 x 5.14 millimeters, presents a compact and well balanced mass that immediately communicates material integrity and provenance. Origin Burma Myanmar, the specimen displays the characteristic dense crystalline structure of corundum from that region, expressed here in an uncommon opaque parti coloration that reads as a blend of deep blue and slate green under standard daylight. The stone is cut in a cabochon style, specifically executed as a double cabochon, which gives it a rounded, lenslike profile on both the crown and pavilion faces, creating a soft, continuous silhouette without facets. The weight to size ratio is consistent with a dense corundum, and the oval outline has been maintained with careful symmetry to preserve visual equilibrium when mounted. This example is offered by The Natural Sapphire Company, and the combination of weight, shape, and origin makes it a notable piece for collectors and designers interested in natural, untreated material with substantive presence.

The cutting technique deserves precise attention for buyers who value the subtleties of cabochon craftsmanship. A double cabochon implies convex shaping on both the top and the back surfaces, rather than the more common domed top with a flat or slightly concave base. This approach requires additional control over the material removal process, as the cutter must balance dome heights and radii on two opposing surfaces to avoid internal stress concentrations and to achieve an even distribution of color and luster. The dome profile on this sapphire is moderate relative to the overall thickness of 5.14 millimeters, which contributes to a pronounced depth of tone without veiling the parti color zones. The polish is described as excellent, and that level of finish on both dome faces enhances surface reflectivity and the perception of saturation, while also reducing the visibility of tiny surface abrasions. Edge treatment has been executed with a soft rounded girdle that transitions smoothly between the oval rim and the double domes, facilitating secure bezel integration for jewelers while minimizing potential stress risers that could complicate setting.

Color and clarity are central to the gemstone narrative, and this sapphire is graded with vivid color intensity and a clarity grade of very slightly included, evaluated at eye level. The vivid intensity describes strong chroma that remains vibrant even though the material is opaque, a characteristic achieved through a combination of saturation and the cabochon geometry which concentrates perceived color through lensing. The bi color parti effect manifests as distinct fields of tonal contrast rather than subtle pleochroic shifts alone, with areas that read as saturated blue juxtaposed against zones of greener slate, producing a visually arresting mottled pattern. Because the stone is opaque, light transmission is minimal, and the visual impact depends on reflected light and surface sheen rather than internal light return typical of faceted stones. Clarity wise, the grade very slightly included at eye level indicates the presence of small inclusions that may be visible upon careful inspection but do not detract from the overall stability or aesthetic of the piece. These internal features can contribute to the stone s individuality, providing natural fingerprinting that can be used for identification and provenance tracking. Importantly, this sapphire has undergone no enhancement, so the color, clarity, and surface finish are natural and intrinsic properties of the material as extracted from Burma Myanmar.

From a practical and design perspective, the piece offers versatile opportunities for high quality jewelry applications, and The Natural Sapphire Company can advise on optimal mounting strategies that respect the stone s integrity. The double cabochon form is well suited to bezel settings that cradle the rounded edges and distribute mechanical load evenly, however open backed mounts with secure bezel or prong work can be used when the design objective is to expose more of the pavilion curve for aesthetic or balance reasons. Given the opacity and vivid saturation, the stone provides a strong visual focal point without requiring additional accent gems to mask translucency, and it pairs effectively with warm metals where contrast is desired, or with cool metals for a tonal, monochromatic presentation. Maintenance is straightforward, with gentle cleaning using warm soapy water and a soft brush recommended to preserve the excellent polish, and mechanical care advised to avoid sharp blows that could chip the rounded edges. For collectors, the unenhanced Burmese origin adds provenance value, and the stone s unique parti coloration makes it an attractive candidate for bespoke pieces that emphasize natural character and artisanal cutting methods.

At The Natural Sapphire Company we emphasize transparent communication about each gemstone s technical attributes, and this 9.37 carat double cabochon bi color parti sapphire is accompanied by our internal documentation detailing weight, dimensions, cutting style, clarity grading, color intensity, enhancement status, and origin. For clients seeking additional assurance, we can facilitate independent laboratory reports and provide high resolution imagery that illustrates the color zoning and surface condition under multiple lighting environments. Our gemological advisors are available to discuss design integration, custom mounting options, and certification pathways, ensuring that buyers understand the implications of the double cabochon geometry and opaque parti coloration for both aesthetics and long term value. This sapphire presents a rare combination of natural, untreated origin, meticulous cabochon workmanship, and striking bi color presence, qualities that appeal to connoisseurs who prioritize natural character and technical excellence in their gemstone selections.