1.40 Ct. Bluish Green Sapphire from Tanzania

This oval bluish green sapphire weighs 1.40 carats, and measures 7.54 by 5.85 by 3.56 millimeters, presented in a mixed brilliant cut that combines a faceted crown designed for light return with a pavilion that balances depth and color, the stone is transparent with a clarity grade of slightly included as evaluated at eye level, the color intensity is described as medium intense, the polish is excellent, the sapphire is natural and untreated with no enhancement, and its origin is Tanzania, a source known for producing sapphires with distinct green blue tones and natural character. The gem displays a well balanced profile, the depth of 3.56 millimeters is approximately one half of the average diameter which supports both good light performance and comfortable setting proportions, the mixed brilliant facet arrangement was chosen to emphasize scintillation while preserving the inherent bluish green hue, and the overall presentation is that of a natural sapphire that retains surface and internal integrity consistent with its clarity grade. The Natural Sapphire Company documents the stone as natural and unenhanced, and the provided measurements and characteristics reflect careful grading and photographic representation.

Under daylight and cool natural light, the sapphire typically reads as a clear bluish green with cool teal undertones, the medium intense saturation allows the stone to show lively color without appearing overly dark, the mixed brilliant cut returns broad flashes of color across the table and facets which accentuate the blue component in neutral or cool lighting. In warm incandescent light the stone tends to take on a greener nuance, the warmer spectrum encourages the green component to become more apparent, and the overall appearance deepens slightly while maintaining transparency. Under modern LED lighting the sapphire will often present a balance between its blue and green aspects, depending on the color temperature of the LED, neutral white and daylight balanced LEDs will emphasize the stone s true medium intense tone, while cooler temperature LEDs lean towards the blue spectrum and warmer LEDs pull the color toward green. Fluorescent lighting can make the stone appear slightly paler, and halogen illumination tends to maximize warmth and rich tone, the moderate refractive properties of corundum mean that the sapphire displays brilliance through facet reflections more than fire or dispersion, and the mixed brilliant cut is effective at creating balanced scintillation and color play across these various lighting conditions.

This sapphire contains internal characteristics consistent with a slightly included clarity grade, these features are visible at eye level and contribute to the natural identity of the stone, the inclusions may appear as small pinpoints or minute internal features and in one view a subtle yellowish area is present which will interact with the surrounding bluish green color to create nuanced visual interest, these internal features do not diminish the gem s transparency, they can create internal focal points that influence how light is perceived as it moves through the stone, the excellent polish ensures that facet junctions are crisp and that surface reflections are clean, which preserves the integrity of light return and aids in presenting the medium intense color evenly. The absence of enhancement means the color and clarity are wholly natural, any zoning or directional color variation observed is a product of the original crystal chemistry and cutting orientation, and this natural variability contributes to the uniqueness and provenance of the piece from Tanzania.

For mounting and everyday presentation, the sapphire s balanced size and oval outline make it suitable for settings that prioritize table visibility, a prong setting or lightly open bezel will allow light to enter the pavilion and maximize the mixed brilliant cut s scintillation, metal choice will influence perceived color, white metals such as platinum and white gold will emphasize the blue aspects and produce a crisper, cooler appearance, yellow and rose gold will introduce warmth that can enhance the green tones and create a richer looking stone in warm light. Care recommendations are straightforward, as corundum is a durable gem that resists scratching, routine cleaning with warm soapy water and a soft brush will maintain sparkle, avoid prolonged exposure to harsh chemicals and substantial thermal shock, and consider professional cleaning if the gem is mounted in a complex setting with hard to reach areas. This sapphire is offered with the documented details and provenance information that clients expect from The Natural Sapphire Company, and the combination of natural, unenhanced origin, mixed brilliant cut, and a medium intense bluish green color make this stone an understated, characterful choice for those seeking a genuine Tanzanian sapphire with predictable, attractive behavior across a range of lighting environments.