4.04 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This transparent cushion shape blue sapphire weighs 4.04 carats, and measures 9.32 by 9.26 by 4.85 millimeters, proportions that deliver a substantial and balanced presence in a range of jewelry designs. The stone is cut as a mixed brilliant, a cutting style that combines a faceted pavilion with a stepped or modified crown to optimize return of light and preserve weight, and it is finished with an excellent polish that enhances face up brilliance. Clarity has been graded as very slightly included when evaluated at eye level, which means that the stone appears clean to the unaided eye while retaining natural internal character under magnification. Color is vivid in intensity, presenting a rich and saturated blue that is characteristic of respected Ceylon origin, and the provenance of this piece is Ceylon Sri Lanka, supplied and authenticated by The Natural Sapphire Company. The sapphire has been heat treated, a stable and widely accepted enhancement that refines color and clarity without compromising structural integrity.

Optical performance of this sapphire is notable, with the mixed brilliant cut delivering scintillation and a deep, velvety core of color when viewed face up, and distinct flashes of light from the pavilion facets when the stone is moved. Transparency is high, allowing the vivid blue to read strongly across the table while the very slight inclusions do not interrupt the overall visual impact. The combination of good dimensions and a balanced crown to pavilion relationship provides an even distribution of tone, which is essential for a uniformly vivid appearance in a cushion shape. The excellent polish contributes to crisp facet junctions and clean reflections, enhancing the perceived depth and saturation of color. These attributes make the stone versatile for a range of settings where the interplay of light and color is a priority.

Durability is one of the defining practical qualities of sapphire, and it is the primary reason this 4.04 carat cushion from Ceylon is particularly suited to daily wear in fine jewelry. Sapphire is composed of corundum and ranks 9 on the Mohs scale of hardness, which gives it a high resistance to scratching from almost all common materials and surfaces encountered in daily life. The stone also benefits from good toughness relative to many other gem materials, meaning it tolerates ordinary knocks and handling when set with appropriate care. Heat treatment applied to enhance color and clarity is a routine and stable process that does not reduce the inherent hardness of corundum, so the treated nature of this sapphire does not affect its suitability for everyday use. For optimal long term performance, secure settings such as well constructed prongs, partial bezels, or full bezels are recommended to protect the girdle and corners, and these approaches can be employed without obscuring the stone because of its generous table and balanced faceting.

Practical considerations for wear and care are straightforward and align with standard best practices for sapphire jewelry. Routine cleaning with warm soapy water and a soft brush will maintain luster, and occasional professional inspection of the mounting will ensure continued security of the setting. This sapphire sits comfortably in ring sizes where a statement centerpiece is desired, and photos of the stone worn on the hand illustrate its scale and presence, with the vivid blue remaining the focal point. Whether set as a solitaire, flanked by accent diamonds, or incorporated into a more intricate design, the combination of vivid Ceylon color, very slight eye visible inclusions, excellent polish, and the robust material properties of corundum make this gem an excellent choice for daily wear. The Natural Sapphire Company provides this gem with full disclosure of origin and treatment, and with the practical durability that customers expect for a lifetime of enjoyment.