1.99 Ct. Grey Star Sapphire from Burma (Myanmar)

This piece is a translucent, 1.99 carat round star sapphire, cut as a classical cabochon with finished dimensions of 6.83 x 6.49 x 4.27 mm, originating from Burma, Myanmar. The cutting approach follows traditional asterism optimization, with the dome oriented perpendicular to the corundum c axis to maximize the interaction of oriented rutile silk with a single overhead light source. The cabochon form on this specimen exhibits a medium dome height relative to diameter, a proportion that preserves internal light diffusion while sharpening the asteral image, and the result is a distinct, six ray star that is consistent with the hexagonal symmetry of natural sapphire. There has been no enhancement to this stone, the silk networks and internal silk concentration that produce the star remain intact and untreated, and the combination of natural silk, Burmese provenance, and unenhanced status places this example within the collector grade category for natural asteriated corundum.

Optically, the sapphire presents a medium color intensity in the grey range, with translucency that allows the star to form with good contrast without producing a fully opaque appearance. The medium grey bodycolor interacts with the white to silvery asteral banding to create a cool, metallic star that is most effective under pinpoint lighting. The excellent polish on the dome produces strong specular highlights and minimal surface diffusion, which helps the star to appear crisp and to migrate smoothly across the dome as the light source or viewing angle changes. Clarity is dominated by fine, oriented rutile silk rather than discrete crystals or cavities, and this silk acts as the optical agent of the star rather than as a detractor from transparency. When evaluating a star sapphire, key parameters include the centering of the star relative to the cabochon symmetry, the sharpness and definition of the rays, and the presence or absence of secondary veiling. This stone demonstrates a well centered star, symmetrical ray distribution, and controlled veiling, attributes that indicate careful preform orientation by the lapidary and precise final shaping to preserve the asterism.

From a practical and connoisseur perspective, this Burmese star sapphire offers several advantages for both display and wear. Corundum hardness confers strong resistance to abrasion, however the cabochon dome and girdle should be protected from hard knocks and abrasive contact to preserve the excellent polish. For mounting, a bezel or closed back setting in warm toned metals will often increase apparent contrast and enhance the perceived depth of the star, while an open back mount can allow more light transmission if a brighter, sheeny effect is desired. Lighting considerations are central to presentation, a single point overhead illumination will best reveal the six ray star, and photographic representation should use controlled directional lighting to reproduce the star accurately. The Natural Sapphire Company stands behind the provenance and disclosure of this gem, and documentation regarding origin and treatment status can be provided on request to support insurance, appraisal, and provenance requirements. Routine care is straightforward, clean with warm water, mild detergent, and a soft brush, avoid harsh chemicals and extreme thermal shock, and consult a qualified jeweler for any re-setting to maintain alignment of the cabochon axis with respect to the intended orientation of the star in the finished piece.