1.66 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This transparent 1.66 carat oval blue sapphire from Ceylon Sri Lanka measures 7.97 by 5.53 by 4.38 mm, and it has a mixed brilliant cut that has been skillfully faceted to maximize light return and scintillation, and the vivid color intensity of this stone presents a deep, pure cornflower to royal blue that is highly sought after by connoisseurs. Clarity has been evaluated at eye level as very very slightly included, and this grade indicates that any internal features are minute and do not detract from the gem when viewed without magnification, and the excellent polish enhances the stone face up for a crisp, lively appearance. Heat treatment is noted, and this is a widely accepted and stable enhancement in sapphire trade practice, it improves color uniformity while preserving natural crystal structure, and provenance from Sri Lanka adds premium value given that Ceylon sapphires are renowned for their clean, saturated blues and fine crystal quality. At 1.66 carat the stone offers substantial presence while remaining versatile for classic solitaire rings or more elaborate settings, and The Natural Sapphire Company stands behind the gemology and documentation that validates these characteristics for an educated buyer.

Beyond the technical specifications, the long term appeal of this sapphire is a key aspect for collectors and those seeking an heirloom piece, and its natural beauty will continue to captivate over the years, as the durable corundum structure resists scratching and remains brilliant with normal care. The mixed brilliant cut balanced against the oval outline provides both fire and a flattering silhouette on the hand, and setting recommendations include protective bezel or low profile prongs to secure the pavilion while allowing light to enter the crown. Routine cleaning with warm soapy water and a soft brush is effective, and heated sapphires are generally stable with ultrasonic cleaning but professional advice is recommended for any stones with unusual inclusions. For buyers who value proven origin, precise measurements, and clear disclosure of enhancements, this Ceylon blue sapphire from The Natural Sapphire Company represents a responsibly sourced, technically excellent gemstone that will continue to reward the wearer and appreciate in desirability over time.