10.89 Ct. Bi Color Rough Sapphire Crystal from Ceylon (Sri Lanka)

This exceptional bi color sapphire weighs 10.89 carats, a carat weight that immediately places it in a premium category for collectors and serious buyers, and its substantial size allows the gem to read as a statement piece in both jewelry and museum quality collections. Measuring 21.29 x 9.10 x 5.68 mm, the stone presents a long, various shape form that preserves the natural crystal geometry, which is emphasized by the rough crystal cut. The rough crystal presentation retains the linear terminations and natural fascia of the original crystal, creating a direct visual connection to the gemological environment in which the sapphire formed. The bi color nature of this sapphire is presented with medium color intensity, a balanced saturation that allows both tones to be distinct yet harmonious, and this intermediate intensity is often preferred by educated buyers who seek color nuance over uniform saturation. Origin is Ceylon Sri Lanka, a source with a storied gemological history and a reputation for producing sapphires with lively color, and provenance from Ceylon adds measurable pedigree that influences desirability and long term value.

Clarity is graded as very slightly included when evaluated at eye level, and that grade communicates a material with small internal features that do not significantly interrupt transparency or overall presence. These inclusions are natural fingerprints of formation, often seen as evidence of authenticity and origin, and in a stone of this size they serve to narrate the growth conditions rather than to detract from aesthetic appeal. The excellent polish enhances surface smoothness and light return on the facets and natural planes that have been retained, allowing the sapphire to show its color zoning and internal character with clarity and depth. Importantly this sapphire has no enhancement, a fact that is increasingly rare and highly valued in the modern market, because untreated sapphires from Ceylon command a premium for their natural state and predictable aging characteristics. From a gemological perspective the combination of significant carat weight, very slightly included clarity, medium color intensity, and an excellent polish, all in an untreated piece, presents a confluence of attributes that educated buyers recognize as indicators of both immediate visual impact and long term investment quality.

For practical considerations and design integration the stone is ideally suited to bespoke settings that celebrate its axial form and bi color transition, and the dimensions make it particularly well suited for elongated ring designs, bespoke pendants, or collector mounts that conserve the raw crystal aesthetic. The hardness and durability of corundum make sapphire a reliable choice for daily wear, and when set by a careful setter the natural terminations and rough crystal lines can be preserved to maintain the gem as a tactile and visual focal point. From an appraisal and acquisition standpoint a 10.89 carat untreated Ceylon bi color sapphire with the described clarity and polish is positioned to be a portfolio piece for connoisseurs who prioritize natural material, traceable origin, and artisanal design potential. The Natural Sapphire Company stands behind our description and provenance, and we encourage prospective buyers to request gemological documentation and high resolution imagery to confirm the attributes that matter most, including carat weight, measurements, clarity observations, and confirmation of no enhancement. Our expertise in sourcing and evaluating Ceylon sapphires means we can advise on mounting options, expected market positioning, and long term care, ensuring that this sapphire not only occupies a place of beauty in your collection but also retains its value and character for generations.