1.08 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This 1.08 carat cushion shape blue sapphire from Ceylon, offered by The Natural Sapphire Company, presents a precise combination of proportions and optical performance that will appeal to a knowledgeable collector or a client seeking a durable everyday gem. The measured dimensions of 6.90 by 5.03 by 3.11 millimeters result in an overall profile that reads as a lively face up presence with efficient weight distribution. The cutter employed a mixed brilliant strategy, combining a brilliant style arrangement on the crown with carefully faceted pavilion planes to enhance scintillation while preserving color saturation. The depth runs to approximately 52 percent of the average diameter, which is deliberately on the shallower side to maximize apparent size and lively reflection across the table, while the excellent polish ensures that facet junctions remain crisp and reflective, optimizing return of light and visual brilliance.

From a material science perspective this sapphire is corundum, registering nine on the Mohs hardness scale, and demonstrating a combination of surface hardness and respectable toughness that makes it especially suitable for daily wear. Corundum lacks true cleavage, and its trigonal crystal structure provides resistance to splitting under typical wear conditions, though as with any faceted stone sharp impacts to facet edges or corners can produce chips. The specific gravity of corundum is approximately four point zero, and optical properties include a refractive index in the range of 1.762 to 1.770, with birefringence in the order of 0.008 to 0.010. These optical constants contribute to strong internal reflection and well behaved light return in mixed brilliant cutting schemes, while the presence of pleochroism in blue sapphire is moderated by the cutter through orientation and facet layout to produce a uniform intense blue face up.

Clarity evaluation at eye level is slightly included, which in practical terms means that inclusions are present but do not materially compromise structural integrity or everyday durability. Slightly included material often contains small crystals, narrow feathering, or silk that can be visible under close inspection, yet these features typically sit below or within facet intersections and do not create stress concentrators at the girdle or pavilion. Because this particular stone is unenhanced, with no heat treatment reported, the inclusions also provide important evidence of natural origin and growth environment, and their controlled placement by the cutter preserves mechanical strength. For wearability purposes this clarity grade is advantageous, since it allows for a higher level of natural, untreated color and character while maintaining robustness suitable for ring settings and daily use pendants.

Color and cutting decisions in this example are synchronized to deliver intense blue saturation with lively scintillation, characteristics that are both aesthetic and functional for jewelry that is worn every day. The intense color intensity indicates strong saturation throughout the body of the gem, a desirable trait for Ceylon sapphires where a vivid cornflower to deep blue is sought. The mixed brilliant cut was chosen to balance color and brilliance, the brilliant crown maximizing return of white light flashes, while the pavilion geometry controls light leakage and supports even color distribution. Because the stone is transparent and well polished, surface reflections remain bright and crisp, and the stone will show dynamic sparkle in moving light, yet retain deep color when viewed directly. In practical jewelry terms this combination yields a gem that reads as both vibrant and stable under office lighting, daylight, and evening illumination.

For daily wear applications the recommended mounting options and care techniques emphasize protection of facet edges and avoidance of sharp knocks. A bezel setting offers the highest level of edge protection and is ideal for clients who lead active lifestyles, whereas four to six prong settings using robust prongs fashioned to cover the corners of the cushion profile will provide a secure and visually open presentation. Avoid settings that leave the table excessively exposed in situations where impact is likely. Cleaning can be performed with warm water, a mild detergent, and a soft brush to remove surface oils and accumulated dirt, and under normal circumstances this unenhanced corundum tolerates ultrasonic and steam cleaning, however if the stone exhibits significant internal feathering it is prudent to avoid aggressive ultrasonic exposure to mitigate any risk. Routine inspection of the setting and prongs is recommended to ensure the gem remains secure over years of wear.

This sapphire is presented by The Natural Sapphire Company with full disclosure of the origin as Ceylon and a documented absence of enhancement, attributes that are increasingly valued by connoisseurs and designers seeking natural provenance. The combination of a well executed mixed brilliant cut, an intense natural blue color, slightly included clarity at the eye level that preserves natural character, and the intrinsic physical durability of corundum makes this 1.08 carat cushion ideal for rings, pendants, and other pieces intended for frequent use. Upon request we can assist with recommendations for mounting styles, metal choices that complement the blue saturation, and provide gemological documentation to support long term ownership and insurance needs.