1.67 Ct. Blue Sapphire from Ceylon (Sri Lanka)

One transparent 1.67 carat round shape blue sapphire is presented with dimensions of 6.71 x 6.63 x 4.77 mm, a mixed brilliant cut, and a clarity grade of very slightly included evaluated at eye level. The stone displays medium color intensity and an excellent polish, characteristics that contribute to balanced light performance and consistent face up appearance. This sapphire is heat treated, a stable and standard enhancement that improves color and clarity in sapphires from Ceylon Sri Lanka, the documented origin of this gem. The Natural Sapphire Company confirms the gem is well proportioned for mounting, with the mixed brilliant cut optimizing both table brightness and pavilion return for a pleasing overall presentation.

The inherent durability of corundum makes this sapphire particularly well suited to daily wear in jewelry, corundum ranks nine on the Mohs hardness scale, providing strong resistance to abrasion and surface scratching under normal use. The stone shows good toughness for everyday settings, though care should be taken to avoid severe knocks or sustained impact on hard surfaces, as with all faceted gemstones. The heat treated nature of the stone is stable and does not adversely affect its hardness, and the excellent polish enhances resistance to dirt accumulation and facilitates routine cleaning. For secure daily wear, common setting choices such as bezel settings or well executed prong mounts help protect the girdle and pavilion while allowing light to enter the crown. Routine maintenance includes gentle cleaning with warm water, a mild detergent and a soft brush, periodic inspection of the setting by a professional jeweler, and avoiding exposure to harsh chemicals and strong acids. Ultrasonic cleaners are generally acceptable for heat treated sapphires without fracture filling, but use should follow professional guidance based on the specific stone. Taken together, the material properties, cut quality and polish of this Ceylon blue sapphire provide a resilient and attractive option for rings, pendants and other pieces intended for frequent wear, reflecting the careful sourcing and standards upheld by The Natural Sapphire Company.