31.17 Ct. Purple Star Sapphire from Ceylon (Sri Lanka)

One translucent 31.17 carat oval purple star sapphire, dimensions 17.01 by 14.75 by 11.97 mm, cabochon cut, clarity graded slightly included at eye level, intense color intensity, excellent polish, no enhancement, origin Ceylon Sri Lanka. The cutting approach prioritizes an evenly domed oval profile, with the table apex aligned precisely to the crystallographic c axis to maximize asterism. The stone displays a well defined six ray star that forms from oriented needle like rutile silk intersecting along multiple crystallographic directions, the star appearing sharpest under a single point light source and maintaining good centering across light angles. Translucency is balanced to provide depth of purple saturation while allowing sufficient internal scattering for a crisp asterism, the slight inclusions acting as the functional silk rather than detracting from transparency. The cabochon exhibits excellent surface finish, achieved through progressive polishing with super fine abrasives to remove lap lines and to produce mirror lustre, the polished dome emphasizing color zoning and silk orientation without introducing surface graining.

From a gemological and design perspective this star sapphire is highly versatile, suitable for both casual and formal settings, capable of anchoring a signature ring for everyday wear or serving as a dramatic focal point in an evening pendant. Corundum hardness of nine on the Mohs scale underpins durability for repeated wear, while the substantial depth of the cabochon and secure bezel friendly oval outline make the stone an excellent candidate for protective settings. The untreated status and Sri Lankan provenance increase collector appeal, and The Natural Sapphire Company documents the natural origin and absence of enhancement, supporting long term value. Recommended care is gentle cleaning with warm soapy water and a soft brush, avoiding abrupt thermal shocks and aggressive chemicals, with cautious use of ultrasonic cleaning advised given the slightly included clarity grade. This piece will appeal to connoisseurs who value precise cutting to reveal natural asterism, and to designers seeking a robust, intensely colored star sapphire that performs elegantly across day to day and formal applications.