1.10 Ct. Bi Color / Parti Sapphire from Tanzania

This 1.10 carat oval bi color parti sapphire represents a deliberate intersection of gemological rarity and exacting craftsmanship, a weight that sits squarely in the premium range for parti sapphires where both color distribution and optical performance are maximized. At 1.10 carats the stone clears the important one carat threshold that often marks a step change in market perception and value, while remaining compact enough to deliver exceptional saturation and light return in smaller, high impact settings. The dimensions of the stone measure 7.06 by 5.10 by 3.78 millimeters, yielding an average diameter of approximately 6.08 millimeters and a pavilion depth to average diameter ratio of about 62 percent, a proportion that the cutter retained intentionally to balance face up spread with internal reflection. This carat weight is not merely a numerical datum, it is an engineered compromise between material yield from rough and the optical goals for a mixed brilliant execution, and it signals to informed buyers that The Natural Sapphire Company has prioritized a premium visual result rather than maximum weight retention alone.

The cutting style is faceted, executed to a mixed brilliant scheme designed to optimize both scintillation and color dynamics in a bi color material. The mixed brilliant approach pairs a faceted crown with a pavilion architecture that integrates both brilliant style facets and controlled step elements, which together modulate light paths to enhance contrast and retain deep, intense color. In this piece the cutter has emphasized pavilion angles that favor internal reflection without deepening the stone to the point of losing face up area, a critical decision when working with parti zoning that can otherwise appear dark or muddied. The result is an intense color intensity, with distinct blue and green episodes visible depending on orientation and lighting, and a strong face up presence that reads as saturated rather than overly dark. Polish quality is excellent, and facet junctions exhibit crisp meet points and symmetric alignment, both of which are essential for sustaining the optical performance expected at this weight and quality level.

Clarity is graded as very slightly included when evaluated at eye level, a designation that indicates minute inclusions which do not materially impede light transmission or compromise structural integrity. For a 1.10 carat transparent sapphire this level of clarity is advantageous because it allows the mixed brilliant faceting scheme to deliver lively scintillation and defined color separation without distracting inclusions. The stone has been heat treated, a standard and accepted enhancement in the trade used to stabilize and intensify color as well as to reduce the visibility of certain inclusions. Heat treatment in this context was applied to bring out the parti character and to achieve a stable, intense tone across viewing angles, while preserving the natural zoning that gives the sapphire its unique bi color appeal. Origin is Tanzania, a source known for producing material that exhibits attractive parti coloration and pleochroic behavior, and provenance is an important consideration for connoisseurs assessing minerological context alongside aesthetic attributes.

From a practical design and appraisal perspective the 1.10 carat weight combined with the 7.06 by 5.10 by 3.78 millimeter platform makes this sapphire exceptionally versatile for bespoke settings where the interplay of blue and green can be oriented to the focal plane for maximum impact. For prong set rings the oval outline and approximately 62 percent depth provide an ideal balance of face up spread and durability, while bezel or partial bezel mounts can be selected to protect girdle edges without flattening the visual depth of the parti coloration. Buyers seeking an investment grade yet characterful sapphire will appreciate that the weight signifies a premium tier, that the mixed brilliant faceting is tailored to accentuate both brilliance and color zoning, and that The Natural Sapphire Company has paired gemological evaluation with careful cutting choices to present a stone that reads as both rare and technically refined.