2.32 Ct. Bi Color Sapphire from Tanzania

This cushion shaped bi color sapphire weighs 2.32 carats, and measures 8.29 by 6.33 by 4.49 millimeters, and it is an excellent example of precision cutting and natural color. The cutter elected a mixed brilliant cut to balance strong scintillation with controlled color saturation, and the crown is fashioned to present a lively play of light across the table while the pavilion facet structure is configured to concentrate and return color. Clarity is graded as very very slightly included evaluated at eye level, and the stone presents as transparent with inclusions that do not interrupt the visual field during normal inspection. Color intensity is vivid, and the bi color habit is composed of a primary deep blue and a secondary lighter tone that shifts with viewing angle and light source. Polish quality is excellent, and the gem is unheated and untreated, confirming that the color and clarity are the result of natural geological conditions in Tanzania. This sapphire is offered by The Natural Sapphire Company, and it is presented with full disclosure of origin and enhancement status.

The mixed brilliant facet arrangement in this cushion example is engineered to exploit the optical properties of corundum, and the relationship between crown angle, table size, and pavilion depth has been optimized to maximize light return while preserving color saturation. The mixed structure typically combines brilliant style facets on the crown to produce dispersed flashes of brightness, and modified step facets on the pavilion to generate broad color flashes and to deepen center color, and this balance yields both scintillation and color weight. Optical parameters for corundum include a refractive index between 1.762 and 1.770, birefringence on the order of 0.008 to 0.010, and low dispersion near 0.018, and these physical constants explain why a well cut sapphire displays both strong color and controlled fire. The bi color effect in this stone derives from natural color zoning and pleochroism, and skilled orientation during cutting aligns the color zones with the facets to produce a pleasing dual tone that remains lively when set in jewelry.

From a durability perspective this sapphire is exceptionally well suited for daily wear in fine jewelry, and corundum scores nine on the Mohs hardness scale which provides superior resistance to scratching compared to most other gemstones. Corundum also exhibits high specific gravity near 3.99 to 4.03 and lacks true cleavage, which reduces the risk of catastrophic breakage under normal wear, and toughness is generally considered good for corundum. For everyday settings we recommend secure mounting strategies to protect the cushion corners and pavilion girdle, and options that work particularly well are bezel settings or prong settings with reinforced corner prongs, and a low to moderate profile will reduce leverage and the chance of blunt impacts. Routine cleaning with warm water, a mild detergent, and a soft nylon brush will preserve polish and luster, and because this sapphire is unenhanced it is typically stable to standard cleaning methods, however we advise a professional assessment before using ultrasonic or steam cleaners in the presence of any surface reaching inclusions.

Craftsmanship details set this piece apart, and the cutter achieved crisp facet junctions, symmetrical outline, and a polished finish that enhances the stone optics without over faceting the color. The result is a gem that reads richly in both direct and diffuse lighting, and the vivid color intensity together with the mixed brilliant architecture creates a dynamic presence whether mounted as a solitaire in a ring, as the center of a pendant, or as a focal element in an artisan setting. The lack of enhancement adds rarity and value, and provenance from Tanzania provides an assured geological context for the color and inclusion characteristics observed. The Natural Sapphire Company offers further technical documentation and mounting recommendations for this sapphire, and our specialists can advise on optimal metal choices, setting styles, and protection strategies to ensure this 2.32 carat cushion sapphire endures as an everyday stone while retaining its natural character. Please contact us for additional measurements, tuning of proportions for bespoke settings, and any laboratory verification you require.