5.86 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This listing describes one transparent, cushion shape blue sapphire weighing 5.86 carats, with precise dimensions of 10.47 by 9.66 by 6.63 millimeters. The pavilion and crown have been fashioned in a mixed brilliant cut, creating a balance of large, scintillating facets and smaller, detail-oriented facets that enhance light return. The gem presents an intense color intensity, a vivid medium to deep blue with a classic Ceylon hue, and evaluates as eye clean at normal viewing distances, indicating no inclusions seen by the unaided eye. The surface finish has been completed to an excellent polish, ensuring crisp facet junctions and smooth, reflective planes. Enhancement disclosure, heat treated, is stated openly, in keeping with industry practice for improving color and clarity stability, and the origin has been documented as Ceylon, Sri Lanka.

The sapphire’s provenance from Sri Lanka is relevant to both its aesthetic character and its ethical considerations. Sri Lankan sapphires typically exhibit the clear, vibrant cornflower to royal blue tones associated with Ceylon deposits, and this stone exemplifies that regional expression. From a sourcing perspective, The Natural Sapphire Company maintains direct relationships with supplying partners and implements documented chain of custody procedures to verify origin and treatment disclosures. These procedures include on-site verification where possible, documented purchase records, and cooperation with local stakeholders to promote transparency. Where stones are heat treated to enhance color, the treatment is standard practice and fully disclosed, and is applied using controlled, professional methods that stabilize the material without degrading its structural integrity.

For the conscious consumer assembling a considered collection, this sapphire offers attributes that align with durable, long-term ownership and ethical sensibilities. As corundum, it rates a nine on the Mohs hardness scale, providing robust resistance to everyday wear and suitability for rings, pendants, and other frequently worn jewels when set with appropriate protective settings. The cushion outline and mixed brilliant faceting lend themselves to both classic and contemporary designs, providing a versatile nucleus for custom work where metal selection, halo design, and setting style can further reflect an owner’s values, such as the use of recycled precious metals or ethically sourced mountings. The eye clean clarity and intense, evenly distributed color reduce the need for corrective treatments beyond the disclosed heat enhancement, and the excellent polish maximizes visual presence without requiring additional modifications.

Care, documentation, and responsible stewardship complete the piece’s suitability for a conscious collection. Routine care involves avoiding prolonged exposure to harsh chemicals and ultra-high heat, and cleaning with mild detergent, warm water, and a soft brush, or professional ultrasonic cleaning where appropriate and after consultation about settings. The Natural Sapphire Company provides full disclosure of treatment and origin at the point of sale, and can supply grading documentation and photographs to support provenance and value retention. For buyers prioritizing ethical and environmental considerations, options such as bespoke design using recycled precious metals, conflict-free sourcing assurances for mountings, and detailed provenance records are available to complement the gemstone. This cushion blue sapphire offers a combination of measurable gemological qualities, transparent treatment disclosure, and documented origin, making it a considered choice for a collector seeking both aesthetic excellence and conscientious sourcing.