1.04 Ct. Color Change Sapphire from Tanzania

This loose gem is a transparent color change sapphire weighing 1.04 carats, cut into a classic oval shape with precise dimensions of 6.16 x 5.24 x 3.73 mm, produced from Tanzanian rough and presented with no enhancement. The cutting style is faceted with a mixed brilliant design, delivering the scintillation expected from a brilliant crown combined with the controlled color dynamics of a modified pavilion. Clarity is described as very slightly included evaluated at eye level, which translates to minimal internal features that do not disrupt light transmission or the overall visual appeal. Color intensity is described as intense, and the stone exhibits a pronounced change between cool blue green tones under fluorescent lighting and warm purplish brown tones under incandescent lighting, a characteristic that is highly prized among collectors and connoisseurs. The polish is excellent, the surface is free of noticeable abrasions, and the transparency remains high, allowing for direct engagement with the gem's color behavior and internal character without the need for magnification.

The faceting treatment maximizes both sparkle and color modulation by combining a brilliant style crown with a carefully faceted pavilion that is tuned to preserve hue saturation while returning light efficiently to the eye. The oval proportions produce a length to width ratio of approximately 1.18, creating a pleasing oval outline that supports even facet distribution and balanced light performance. The depth, at approximately 65 percent relative to the average of the outline dimensions, helps retain viable table size while maintaining sufficient pavilion volume to concentrate and reveal the color change phenomenon. Facet junctions are crisply defined and symmetry is controlled across the girdle, resulting in a stone that reads consistently whether set in a fine mounting or examined loose. The mixed brilliant approach is especially effective for sapphires that display dichroic or trichroic tendencies, as it allows the cutter to orient the pavilion facets to favor desirable pleochroic faces while the crown facets create the scintillation that animates the transition between lighting environments.

From a gemological perspective this sapphire benefits from the inherent durability and stability of corundum, a material with a Mohs hardness of nine, which makes it suitable for daily wear in rings or in other jewelry that is exposed to routine handling. Optical properties typical of corundum are present, including a refractive environment that produces strong luster and a moderate birefringence that can enhance the perception of depth in the stone. The lack of heat treatment or other enhancements is an important factor for long term value and collector interest, because untreated color change sapphires are less common and are viewed as more authentic representations of natural geological conditions. The very slightly included clarity grade is an advantage in that the inclusions serve as fingerprints of natural origin without compromising the gem's visual purity, while the excellent polish and facet execution preserve the stone's surface integrity for mounting and appraisal.

Investing in this particular sapphire through The Natural Sapphire Company is an investment in both aesthetic rarity and refined lapidary skill. Untreated color change sapphires with intense color and precise cutting are sought after by serious collectors and by clients seeking a singular center stone for bespoke jewelry. The combination of a well controlled mixed brilliant cut, a robust depth percentage, transparent material quality, and a Tanzanian origin that is associated with a distinct palette of color change shades, ensures that the gem will perform beautifully in a variety of settings and will retain desirability over time. For practical use considerations, an open style or low bezel mounting will allow maximum interaction with ambient light and will showcase the stone's transition between blue green and purple brown, while a halo or contrasting metal can enhance perceived size and emphasize color contrast. When acquired as part of a considered collection or as the focal element of a custom commission, this sapphire represents a durable and evocative asset, one where provenance, craftsmanship, and the natural phenomena of color change converge to create enduring value. For further technical details, setting recommendations, or to request viewing under multiple lighting conditions, please contact The Natural Sapphire Company and our gem specialists will assist in assessing how this stone best fits your collection objectives.