4.59 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This transparent C.Dunaigre certified Blue 4.59 carat cushion shape blue sapphire, with dimensions of 10.78 by 9.35 by 5.46 millimeters, is an exceptional example of Ceylon Sri Lanka material, and The Natural Sapphire Company is proud to present it. The gem has a mixed brilliant cut which brings together the depth and color saturation you expect from a classic cushion outline, with the lively light return and scintillation of brilliant facet work. At medium intense color intensity this sapphire achieves a beautifully balanced blue that reads immediately as vivid without veering into overly dark territory, and the clarity grading of very slightly included, evaluated at eye level, means the stone is essentially eye clean and offers unobstructed, transparent brilliance. The excellent polish sharpens facet junctions and produces crisp reflected flashes, and the heat treated enhancement is a standard and stable process that brings out the best in the stone without compromising integrity. The C.Dunaigre certification provides independent confirmation of weight, origin, and treatment, giving buyers the peace of mind that provenance and quality are fully documented.

When compared to other gemstones in the same category, this sapphire stands out for its overall reflective qualities, and the mixed brilliant cut is a significant differentiator. Many sapphires are fashioned in step cuts or shallow cushions that emphasize color at the expense of lively reflection, producing broad flashes and a softer look. This 4.59 carat cushion, by contrast, uses brilliant-style crown and pavilion facets to maximize light return, creating numerous small, crisp flashes that dance across the table and pincushion corners, a type of scintillation that rivals the most admired brilliant cuts while preserving the traditional cushion silhouette. Compared to Kashmir and Burmese sapphires, which may be prized for their velvety saturation or inky blues, this Ceylon stone offers a brighter, more open, and more scintillating presentation that catches light in a way those deeper stones sometimes mute. Against market alternatives such as spinel, aquamarine, tanzanite, and blue topaz, corundum inherently benefits from a higher refractive character and superior hardness, so reflections remain sharp over time and the stone resists wear. Spinel can be bright and lively but often lacks the same depth of tone and durability, tanzanite shows strong pleochroism that can shift color under different light and wear conditions, and blue topaz can appear glassy and lacks the natural richness of sapphire. This Ceylon sapphire’s mixed brilliant design and excellent polish create a superior balance of vibrant flash, windowless depth, and enduring surface luster that outperforms many common blue gemstones in everyday light.

Beyond pure optics, the practical advantages of this sapphire make it an outstanding choice when compared to other options on the market, offering both quality and value. The 4.59 carat weight and generous dimensions give a commanding presence in a ring or pendant, and the cushion shape is exceptionally versatile for classic and contemporary settings. The medium intense color makes this sapphire wearable with a wide range of metals and designs, because it reads beautifully next to white gold, platinum, and yellow gold in photographs and in person, while still showing enough saturation to maintain distinction when set alone or with accent stones. The eye level very slightly included clarity contributes subtle character under magnification, while to the naked eye the gem reads clean and luminous, allowing light to travel through the depth of the stone for consistently attractive reflections. Heat treatment is a common, accepted enhancement with the beneficial effect of stabilizing and enhancing color, and because the treatment, origin, and attributes are documented by C.Dunaigre, buyers receive full transparency and confidence. At The Natural Sapphire Company we prioritize stones that deliver a superior visual performance relative to their category, and this Ceylon cushion sapphire, with its mixed brilliant cut, excellent polish, proven origin, and balanced color and clarity, represents a smart choice for customers seeking a gem that combines rare beauty, superior reflective qualities, and enduring value.