4.82 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This 4.82 carat cushion shape blue sapphire from The Natural Sapphire Company presents a technically refined combination of weight, proportions, and faceting, delivering exceptional optical performance. The gem measures 10.15 x 9.42 x 5.65 mm, yielding a depth of approximately 57.8 percent, a proportion that balances internal light retention with surface brilliancy for a cushion profile. The cutter has executed a mixed brilliant strategy, utilizing a brilliant style crown to maximize scintillation, and a faceted step pavilion to enhance body color and directional light return. The result is a vivid color intensity with saturated blue tones that remain lively under varying light sources, while the excellent polish on every facet junction produces crisp facet contrast and well defined windowed areas with minimal light leakage. The cushion outline exhibits gently rounded corners and a symmetrical girdle plane, attributes that contribute to predictable setting geometry and even visual spread on the finger.

Clarity is described as very slightly included when evaluated at eye level, indicating minimal internal characteristics that do not compromise transparency or play of light. In practical terms the stone reads as clean to the unaided eye in standard viewing conditions, while subtle needle and crystal inclusions under magnification act as internal fingerprints confirming natural origin and contributing to light diffusion rather than impairing brilliance. The surface finish is excellent, the facet meeting lines are tight, and facet proportions are consistent, which together minimize stress concentration points and reduce the likelihood of edge chipping during routine wear. The sapphire has undergone standard, stable heat treatment to enhance color uniformity and reduce silk like inclusions, a widely accepted enhancement in oriented Ceylon material. The treatment is permanent under normal wear and cleaning, and does not affect the inherent hardness and toughness characteristics of corundum.

From a durability and daily wear standpoint, this Ceylon sapphire is particularly well suited to rings and other jewelry intended for regular use. Corundum rates nine on the Mohs scale of mineral hardness, second only to diamond, which translates to strong resistance to surface abrasion and retained polish over many years of contact with normal surfaces. The specific gravity near four and the crystal lattice of aluminium oxide confer good toughness, meaning the stone resists cleaving and chipping when set with appropriate protective measures. For daily wear applications we recommend secure four or six prong settings for rings that expose pavilion and girdle areas to impact, or a bezel setting for maximum edge protection. The cushion shape with softened corners reduces stress concentration relative to sharp cornered cuts, offering an additional advantage for ring wear. Routine care is straightforward, cleaners based on mild detergent and warm water, soft brushes, and professional ultrasonic or steam cleaning on occasion are suitable, given the permanent nature of the heat enhancement.

Provenance from Ceylon, Sri Lanka, places this sapphire within a well documented supply chain known for producing blue sapphires with lively cornflower to deep royal blue hues and refined crystalline clarity. The combination of vivid color intensity, balanced proportions, and meticulous cutting work by experienced lapidaries exemplifies the high standards held by The Natural Sapphire Company for collector grade and bridal gemstones. For the connoisseur seeking a stone that combines visual impact with everyday practicality, this 4.82 carat cushion sapphire offers a rare intersection of aesthetic depth and structural resilience, making it a reliable choice for heirloom worthy rings, pendants, and bespoke settings designed to be worn daily.