6.92 Ct. Blue Star Sapphire from Burma (Myanmar)

One beautiful translucent 6.92 carat oval blue star sapphire is presented with precise measurements of 10.26 by 9.50 by 6.48 millimeters, the gem cut as a classic cabochon to maximize asterism and body color, the clarity graded as very slightly included when evaluated at eye level indicating minor internal features that do not materially detract from visual performance, the overall color described as a medium intensity blue with a subtle cool tone that balances saturation and light transmission, the surface finish executed to an excellent polish which preserves both luster and star contrast, no enhancements reported so the stone is natural and untreated, and the documented origin is Burma Myanmar which is recognized for producing historically significant star sapphires. The asterism manifests as a distinct six ray star, the rays are formed by oriented rutile silk inclusions aligned parallel to crystallographic axes such that interaction with a single point light source produces a sharp, mobile star, the star is well centered on the cabochon apex and exhibits clean, linear rays with good contrast relative to the background bodycolor, under direct point illumination the star presents as bright and well defined, under diffuse lighting the star softens into a gentle banded sheen which demonstrates consistent internal silk distribution.

From a lapidary and craftsmanship perspective the cabochon geometry reflects deliberate choices to optimize optical phenomena while preserving weight, the oval outline with a length to width ratio close to 1.08 produces an appealing visual footprint when set, the 6.48 millimeter thickness yields a substantial dome height that enhances the asterism by providing sufficient path length for rutile scattering without inducing excessive windowing or light leakage, the cutter oriented the stone with its optical c axis normal to the dome to ensure the six ray asterism aligns concentrically, preforming and successive fine grinding steps were controlled to maintain parallelism of rutile planes and to avoid disruptive asymmetry, the excellent polish minimizes microabrasion and surface diffusion of light so that specular highlights do not obscure the star, edge transitions have been smoothed to reduce light scattering at the base, and the overall result is a balance of brightness, star definition, and retained carat weight that reflects advanced cabochon technique.

In terms of practical use, market considerations, and care, the combination of natural Burmese origin and absence of enhancement confers appreciable premium for collectors and connoisseurs who prioritize provenance and integrity, the medium blue tone and pronounced star make this gem suitable for a prominent ring or pendant where directional light exposure will permit full appreciation of the asterism, setting recommendations include a bezel or partially open gallery which protects the dome while allowing perpendicular light to reach the star, prong settings may be used provided the dome is not overly obstructed, routine cleaning with warm soapy water and a soft brush is advised to remove surface oils and preserve polish, ultrasonic cleaning is not recommended if there is concern about surface reaching inclusions or any preexisting fissures, the Natural Sapphire Company documents this stone with imagery and provenance information and can provide additional magnified photography, lightbox imaging, and independent laboratory reporting on request, please contact The Natural Sapphire Company for further technical data, mounting options, and bespoke design consultations.