3.59 Ct. Blue Sapphire from Ceylon (Sri Lanka)

One beautiful transparent C.Dunaigre certified Vivid Blue Royal Blue blue sapphire is presented by The Natural Sapphire Company, weighing 3.59 carats, fashioned into an elegant oval shape with precise dimensions of 10.61 x 7.66 x 5.04 mm. The cutting style is faceted, executed as a mixed brilliant cut that balances a faceted crown and pavilion to enhance both brilliance and color saturation. Color is the defining attribute of this stone, evaluated as vivid intensity with a deep royal blue presence that remains lively under a range of lighting conditions. Clarity is graded as very slightly included when evaluated at eye level, meaning the stone is attractive and clean to the unaided eye while retaining natural internal characteristics that testify to its authenticity. The finish is of excellent polish, producing crisp facet junctions and lively reflections. Enhancement described for this sapphire is heat treated, a stable and widely accepted treatment used to intensify color and improve clarity, and the sapphire is documented as originating from Ceylon, Sri Lanka, a source long respected for producing high quality blue sapphires.

From a gemological perspective this sapphire carries many attributes that an educated buyer will value. The mixed brilliant cut is chosen to maximize light return while preserving the saturation that makes Royal Blue so prized, the crown facets disperse light across the table while the pavilion facets deepen the blue and contribute to scintillation. The oval outline, at just over ten and a half millimeters by seven and two thirds millimeters, provides an excellent face up spread relative to its 3.59 carat weight, offering the visual impact of a larger stone without excessive depth. The 5.04 mm depth yields proportions that sit well in fine jewelry, avoiding a top heavy appearance while retaining enough pavilion for strong optical performance. Very slightly included clarity at eye level confirms that the stone is free from any material inclusions that would distract from its beauty, while the presence of minor natural features supports traceability and confirms that the sapphire is natural rather than synthetic. The C.Dunaigre certification provides independent verification of these attributes, and the stated heat treatment is consistent with responsible trade practices that disclose enhancements rather than obscure them.

This sapphire is especially ideal for custom jewelry projects, for reasons of size, shape, and optical performance. Oval sapphires of 3.59 carats and proportional dimensions offer remarkable versatility, fitting elegantly into solitaire rings, halo settings, three stone designs, and pendant mounts, while also providing the option for an east west orientation for a contemporary look. The oval shape elongates the finger when set in a ring, and the 10.61 by 7.66 mm table area displays color and cut to best advantage, making the stone a commanding focal point in bespoke engagement rings or signature cocktail pieces. The mixed brilliant cut enhances sparkle on both sides of the table, which means the stone will read as lively in day to day wear yet remain deeply saturated when viewed directly. Practical setting considerations include a secure four or six prong basket to protect the girdle, or a low profile bezel for durability without sacrificing color visibility. Choosing warm metals such as 18 karat yellow gold will slightly warm the appearance of the blue, while platinum or white gold will maintain the stone in a cool, true royal blue presentation. The Natural Sapphire Company team can advise on mounting proportions so that the stone sits at an ideal height, and can provide CAD renderings and setting recommendations to ensure symmetry and secure prong placement for this near four carat oval.

Long term, a vivid blue sapphire of Ceylon origin with independent certification and excellent polish represents a sound choice for collectors and clients seeking enduring beauty and pedigree. Heat treatment is stable and accepted in the market when disclosed, and the presence of natural inclusions at the very slightly included grade ensures the gem is natural and traceable. For custom commissions, this oval sapphire offers a rare combination of face up presence, saturated royal blue color, and practical proportions that adapt well to many design languages from classic to modern. The Natural Sapphire Company stands behind every detail in this description, and we are available to discuss design options, metal choices, and setting styles that will showcase the unique character of this 3.59 carat Ceylon sapphire while ensuring long term wearability and aesthetic balance.