11.54 Ct. Bi Color / Parti Star Sapphire from Burma (Myanmar)

This listing presents one beautiful translucent 11.54 carat oval shape bi color parti star sapphire, with dimensions 11.57 by 10.58 by 8.07 millimeters, cut en cabochon to best display its asterism and body color. The cutting style is a traditional domed cabochon, chosen to allow the six ray star to form and glide across the surface when light is moved, and the polish is rated excellent which gives the stone a smooth reflective surface and strong visual appeal. The clarity has been evaluated at eye level as slightly included, a grade that is commonly associated with natural star sapphires where fine rutile needle inclusions generate the desirable star effect. This specimen is natural and untreated, with no enhancement, and its origin has been assessed as Burma Myanmar, a source long esteemed for producing classic, high quality corundum with desirable color and silk structures.

For an educated buyer, understanding the interplay between inclusion, cut, and asterism is essential, and this stone provides a textbook example. The slightly included clarity grade should not be viewed as a flaw in the context of a star sapphire, because the microscopic inclusions of rutile known as silk are precisely what produce the asterism phenomenon. These oriented needle like crystals reflect light to form a distinct six rayed star centered on the cabochon surface, and the medium color intensity of this bi color parti stone contributes to a balanced contrast that allows the star to remain visible without being washed out or overly dark. The bi color character denotes multiple tones within the same crystal, often occurring as zones of different saturation or hue, and in parti sapphires this can give an attractive, painterly appearance that changes subtly with the angle of view. The dimensions and weight are well proportioned for a strong, rounded domed profile, which maximizes the star effect, and the excellent polish further enhances luster and the crispness of the star lines.

From a gemological and investment perspective, several attributes make this sapphire noteworthy. The material is natural corundum, which rates nine on the Mohs hardness scale, offering excellent durability for everyday jewelry such as rings or pendants when properly set, and its substantial 11.54 carat weight places it in a category attractive to collectors and connoisseurs who value larger natural stars. The origin of Burma Myanmar carries premium recognition because Burmese sapphires historically display particular silk structures and attractive body colors, and an untreated natural stone from this region will command higher interest among educated buyers who prioritize provenance and natural state. No enhancement is declared for this stone, and the absence of heat treatment or diffusion processes preserves the original crystal features, silk orientation, and natural color zoning. Slight inclusions visible at eye level should be expected and are in many cases desirable for star sapphires, as they are functional to the asterism and a marker of natural formation.

At The Natural Sapphire Company we emphasize transparency and education in every presentation, and this star sapphire is described with precise technical detail to support informed decisions. The combination of a substantial carat weight, a well executed domed cabochon cut, medium color intensity, natural bi color appeal, Burmese origin, no enhancements, and an excellent polish make this stone both an attractive wearable gem and a desirable addition to a specialized collection. For setting recommendations we suggest designs that preserve the dome and allow light to interact with the surface, and settings that protect the girdle are advisable to maintain the gem integrity through daily wear. If you would like a close up examination, lighting tests to view the star, or guidance on mounting options to best showcase the asterism, The Natural Sapphire Company team can assist with professional advice and further documentation regarding the stone characteristics.