5.65 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This transparent blue sapphire weighs 5.65 carat, and presents in an elegant emerald cut measuring 11.72 by 8.13 by 6.02 millimeters, a proportion that yields an approximate depth of 61 percent by standard depth calculation. The stone is from Ceylon Sri Lanka, and exhibits a vivid color intensity that reads as a saturated, pure blue with minimal violet or green modifiers. Clarity is graded as very slightly included when evaluated at eye level, which means the stone retains clean visual appeal to the unaided eye while preserving natural character under loupe inspection. The cut is executed with an emphasis on rectangular geometry, producing long step facets and truncated corners that create broad flash and a deep, velvety color window across the table, and the surface finish is described as excellent polish, resulting in crisp facet junctions and strong light return.

From a lapidary perspective the emerald cut on this sapphire demonstrates considered trade offs between color retention and light return. The cutter has employed classical step cutting on the crown and pavilion, tuning facet widths to avoid over thinning of the pavilion and to preserve the rich Ceylon blue that is most desirable in this material. Emerald cut step facets create parallel planes that reveal the stone inside, so clarity orientation and facet arrangement were optimized to present a clean, lively face up appearance while still allowing the depth of tone to remain intact. The broad table and defined steps favor bold flashes and a streamlined play of light, rather than scintillation, making this sapphire particularly suited to designs that celebrate color and form. The excellent polish enhances the contrast between facet planes, improving overall luster and the perception of saturation without sacrificing transparency.

The stone has been heat treated, which is a stable and widely accepted enhancement in the industry used to enhance color and clarity in corundum. Heat treatment in Ceylon material typically serves to disperse microscopic color centers and reduce masking by fine inclusions, and in this example the treatment has produced a vivid, evenly distributed blue while retaining natural internal features that are consistent with origin. The very slightly included clarity grade indicates small, typically silicate or mineral inclusions that do not compromise structural integrity, and that may even serve as microscopic fingerprints that affirm natural origin. For practical use the sapphire is well suited to secure prong settings or a protective bezel, and given its dimensions and rectangular profile it translates well into classic solitaires, three stone rings with shoulder accents, or bespoke pendant settings that allow the elongated table to read clearly. The stability of the heat treatment means normal wear and routine jewelry cleaning will not alter the appearance, but professional maintenance is recommended to preserve polish and setting security.

At The Natural Sapphire Company we place sourcing integrity at the center of our buying and selling practice, and this Ceylon sapphire is procured through channels that prioritize traceability, fair labor, and environmental stewardship. Sri Lankan sapphires have a storied geological and cultural provenance, and our sourcing partners engage directly with local communities to ensure responsible extraction and to support sustainable livelihoods. For the conscious collector this sapphire offers more than visual and gemological quality, it offers a documented supply chain and transparent disclosure of enhancement and origin, enabling an ethical acquisition that can be incorporated into a curated collection of responsibly obtained gemstones. We provide detailed provenance notes and can assist with independent certification and bespoke design options, ensuring that this vivid blue emerald cut sapphire serves as an elegant and ethically grounded centerpiece for an heirloom quality ring or pendant.