4.13 Ct. Bi Color / Parti Sapphire from Ceylon (Sri Lanka)

One of the most compelling stones in our current collection is a transparent radiant shape bi color parti sapphire weighing 4.13 carats, with precise dimensions of 9.48 x 7.90 x 5.80 mm. This gem is faceted in a radiant cut that harmonizes the clean lines of a rectangular profile with the scintillating brilliance of a mixed facet arrangement, resulting in lively fire and a pleasing play of light across the table. The color presentation is a gentle parti expression with light color intensity, revealing both cool blue tones and warm golden notes depending on the angle and the light. Clarity is very very slightly included when evaluated at eye level, which means that to the naked eye this sapphire reads as transparent and clean, while under magnification the natural inclusions become a record of the stone s formation. The polish is excellent, and importantly this gem is untreated, with no enhancement, an attribute that preserves its natural character and contributes to its long term value. Origin is Ceylon in Sri Lanka, a region with a venerable reputation for producing some of the world s most admired sapphires.

The story of Ceylon sapphires is woven into centuries of trade, culture, and regal adornment, and this parti sapphire carries that legacy in both provenance and presence. Sri Lankan sapphires have been prized since antiquity by kings and traders who prized their deep color and resilient beauty, and that history informs the timeless appeal of this piece. Parti sapphires themselves have a storied place in gem lore, prized for their natural zoning that captures fleeting moments of the natural world, as if a single stone holds a sunset and a twilight sky side by side. For those who admire tradition, a sapphire like this resonates with craftsmanship of the past, a continuity of taste that spans generations, and a design language that remains ever relevant. A radiant cut with classical proportions speaks to both past and present, a bridge between the jewelry silhouettes that graced royal cabinets in earlier centuries and the contemporary sensibilities of restrained elegance.

Beyond its pedigree and personality, the physical size and shape of this 4.13 carat radiant parti sapphire make it an exceptional candidate for custom jewelry. The 9.48 x 7.90 mm footprint offers a generous visual presence without becoming unwieldy, ideal for engagement rings that demand both impact and practicality. The radiant cut gives a slightly softened rectangular outline that sits comfortably under the hand when set east west or north south, and it adapts beautifully to a variety of settings. A classic solitaire of finely tapered prongs will celebrate the stone s purity, while a halo setting can amplify light and broaden the presence for a more dramatic look. Three stone designs will allow complementing side stones to pick up and play with the sapphire s bi color nature, and bespoke bezel settings can offer modern protection while allowing the pavilion to breathe through an open gallery, maximizing the stone s interaction with light. The light color intensity and transparent clarity ensure that the sapphire will take metal choices beautifully, with yellow gold enriching the warmer yellow notes, white gold or platinum clarifying the cooler blue areas, and rose gold offering a romantic counterpoint to the golden tones. The excellent polish and faceted brilliance mean that whether set as a pendant, a signet, an engagement ring, or an heirloom brooch, the stone will return light with lively sparkle and a sophisticated depth that complements intricate hand engraving or clean contemporary lines.

At The Natural Sapphire Company we specialize in translating rare gems like this Ceylon parti sapphire into pieces that become part of a family narrative, designed to be worn often and treasured always. We approach each commission with respect for the stone s origin, its untreated character, and its historical echoes, while collaborating closely with you to determine the perfect metal, setting, and supporting stones that will honor this sapphire s unique voice. Documentation of origin and treatment status can be provided for collectors who value traceability, and our bench will create detailed design sketches and wax models so you can see how dimensions such as 9.48 x 7.90 x 5.80 mm will translate into the final work. For those who seek an engagement ring that bridges tradition and contemporary style, or for a bespoke pendant intended to be a future heirloom, this radiant bi color sapphire offers a rare combination of history, versatility, and wearable scale. We invite you to imagine this gem as the centerpiece of a design that begins with the lineage of Ceylon craftsmanship and continues with the personal story you choose to inscribe around it. Contact The Natural Sapphire Company to discuss design options, metal pairings, and the many settings that will best reveal the beauty and legacy of this exceptional stone.