0.62 Ct. Blue Sapphire from Ceylon (Sri Lanka)

One transparent 0.62 carat round blue sapphire, dimensions 4.72 by 4.73 by 3.63 millimeters, presents a technically accomplished proposition for the collector who values proportion and optical performance. The stone is faceted to a mixed brilliant specification, combining a brilliant-style crown with a pavilion configuration oriented to maximize color return and internal scintillation. Calculated depth is approximately 76.8 percent relative to the average diameter, a deeper profile than typical diamond proportions but an intentional cut decision in corundum to enhance chroma and visual saturation. The cutting exhibits excellent polish and precise facet junctions, and symmetry that maintains consistent light paths through the crown and pavilion. Clarity is graded as very very slightly included at eye level, indicating an eye-clean appearance with only minute internal characteristics that do not compromise transparency or faceting contrast. These physical attributes yield a round that balances the tradeoffs between brilliance, face-up size, and color concentration in a way that is both measurable and visually coherent.

Color performance is the defining technical attribute of this sapphire, evaluated as intense in color intensity and displaying the hallmark Ceylon blue associated with Sri Lankan origin. The mixed brilliant treatment of the stone was executed to retain maximized saturation without sacrificing light return; the shallow brilliances on the crown paired with the deeper pavilion facets produce a stable, vivid face-up hue under standard daylight and artificial illuminants. As corundum, the material inherently exhibits subtle pleochroic tendencies; under directional light the stone may show slightly variable blue tones, which is a typical and desirable optical signature of natural sapphire. The intense color intensity, combined with the round mixed brilliant faceting, delivers a strong, saturated face-up appearance that reads larger than its 0.62 carat weight might suggest, a consideration that experienced lapidaries and designers factor when matching sapphires to fine jewelry profiles.

Enhancement and gemological stability are clearly disclosed and are central to responsible merchandising. This sapphire has been heat treated, the industry-accepted enhancement for improving color and clarity in natural corundum. Heat treatment in corundum is generally permanent and stable under normal wear conditions, and it does not materially alter hardness or structural integrity; sapphire retains a Mohs hardness of nine and refractive indices in the range typical for corundum, which supports daily wear in rings, pendants, and other fine settings. Given the deeper pavilion geometry, practical mounting considerations include allowing for adequate setting depth or using a low-profile bezel or well-proportioned prong arrangement to protect the girdle and maintain optical alignment. The gem’s excellent polish and durable material make it suitable for classic solitaire presentations, halo settings that amplify apparent diameter, or bespoke three-stone designs where color matching and proportion are critical.

Provenance and ethical sourcing are integral to the value proposition offered by The Natural Sapphire Company. This sapphire originates from Ceylon, Sri Lanka, and our sourcing framework emphasizes traceability, transparency, and responsible partner relationships. We work directly with established on-the-ground partners and local supply chain participants to ensure that each parcel is acquired with documented origin information and with attention to fair commercial terms for miners and artisanal workers. For the conscious consumer, the stone’s disclosed heat treatment, origin attribution, and the availability of detailed documentation reflect an approach that favors full disclosure over obfuscation. The Natural Sapphire Company maintains internal due diligence protocols and offers provenance information and gemological reports on request to support ethical purchasing decisions. Collectors seeking stones that align technical excellence with socially responsible sourcing will find this 0.62 carat Ceylon blue sapphire a compelling candidate for a considered collection, and our team is available to provide precise mounting specifications, matching services, and certification options to integrate the gem into a principled and enduring jewelry piece.