2.90 Ct. Color Change Star Sapphire from Ceylon (Sri Lanka)

One translucent, color change star sapphire, weighing 2.90 carats, oval shape, dimensions 7.98 by 6.40 by 4.77 millimeters, cabochon cut. The stone originates from Ceylon Sri Lanka, and is accompanied by an independent laboratory report labeled Other, which classifies the specimen as Color Change. Clarity is graded as very slightly included when evaluated at eye level, indicating minor internal characteristics that do not materially detract from the gem when set. Enhancement status is none, confirming that the sapphire is natural and unheated. The overall finish is evaluated as an excellent polish, with smooth surfaces and well controlled luster across the dome of the cabochon.

The sapphire exhibits a pronounced color change, with its appearance shifting between lighting conditions, reflecting the lab classification. Under fluorescent illumination the gem shows stronger bluish tones, while under incandescent lighting the body color shifts toward violet and purplish nuances, consistent with color change behavior in corundum. Color intensity is described as intense, which supports vivid optical performance despite the cabochon profile. The material is translucent, allowing light to scatter within the body and to interact with internal silk and oriented inclusions that produce the chatoyant star effect. The star is readily visible under direct light, and it appears well centered across the face of the dome, enhancing the visual impact of the color change.

The cabochon cut has been executed to display both the color change and the star, with a dome height and symmetry that optimize asterism while preserving weight. The domed profile and polished surface produce a sharp, concentrated star under point source lighting, demonstrating effective orientation of the internal rutile silk. The proportions and oval outline are suitable for a range of settings, and the dimensions noted give clear guidance for mounting. Recommended mounting styles include secure bezel settings that protect the girdle and dome, and recessed prong or halo designs that accommodate the depth while allowing the star to be viewed directly. The stone is well suited to a center setting in a ring or pendant where the star can be presented under controlled lighting, or to a collector mount where the specimen can be examined under varying illuminants.

Care and handling follow standard recommendations for natural corundum, with warm soapy water and a soft brush for routine cleaning, avoiding aggressive chemicals and prolonged ultrasonic exposure given the presence of oriented inclusions and the cabochon form. The absence of enhancement supports conservative cleaning and regular inspection when set for daily wear. Documentation from the Other laboratory will accompany the gemstone, providing independent verification of color change classification, weight, measurements, clarity grade, enhancement status, and origin Ceylon Sri Lanka. The Natural Sapphire Company confirms the material details described here, and provides assistance with mounting and certification questions to ensure the gem is appropriately represented and protected.