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

This offering from The Natural Sapphire Company is a transparent 1.22 carat oval purple star sapphire, with exact dimensions of 6.90 x 5.38 x 3.03 millimeters, presented in a classic cabochon cut. The cabochon shape and proportions are essential to the presentation of the asterism, and the excellent polish reported for this stone ensures that light interacts with the surface in a way that sharpens and centralizes the star phenomenon. The medium intense purple color lies in a range that is both visually appealing and versatile for use in fine jewelry, and the transparency of the material adds a depth and liveliness that is less common in star sapphires than the more frequently encountered translucent examples. At face up inspection the gem displays very slightly included clarity when evaluated at eye level, a level of clarity that preserves overall appearance while often being indicative of the microscopic needle like inclusions that actually produce the star.

From a gemological perspective the star effect or asterism seen in this sapphire is caused by oriented needle like inclusions, typically rutile, that intersect in such a way that a star appears when light strikes the dome of the cabochon. The cabochon shape is ground with an intentional symmetry to align these inclusions with the table, and an excellent polish is imperative to avoid scattering light and softening the asterism. Because this stone is transparent rather than heavily included or opaque, the interplay between body color and internal reflections can produce a star that appears to float with greater depth inside the gem. For an educated buyer, that combination of transparency and structured asterism is important, because it demonstrates both the internal crystalline integrity of the material and the lapidary skill applied to maximize the optical phenomenon without compromising the gem clarity or overall finish.

The documented origin for this star sapphire is Ceylon, Sri Lanka, a provenance that carries historic and commercial significance. Sri Lankan sapphires are renowned for their crystalline quality and for producing well shaped, highly finishable material across a range of colors. Origin is a meaningful factor in valuation for collectors and connoisseurs, because certain deposits yield characteristic color and inclusion patterns that experienced gemologists and the market recognize and prize. Equally significant is the disclosure that this gem has undergone no enhancement, so the color, clarity, and asterism are natural. In the trade many sapphires are heat treated to improve tone and remove undesirable hues, and untreated material with desirable color and asterism commands a premium. The absence of enhancement therefore increases both the desirability and the rarity of a fine looking transparent star sapphire in this size class.

For practical considerations in selecting, mounting, and caring for this gem, the 6.90 by 5.38 millimeter oval is an excellent size for a center stone in a ring, for a classic pendant, or as the focal point in a bespoke piece. The cabochon dome and 3.03 millimeter depth provide sufficient material for secure bezel settings, which also protect the surface and preserve the sharpness of the star during daily wear. From a maintenance standpoint mild soapy water and a soft brush are the safest cleaning methods, avoiding harsh chemicals and rapid thermal shocks. For buyers who require further assurance, The Natural Sapphire Company can assist with independent laboratory testing and documentation that confirm the lack of treatments and the origin, and we provide detailed photographs and viewing advice to show the asterism under direct lighting conditions. For an educated buyer assessing value, this transparent 1.22 carat Ceylon purple star sapphire represents a well documented, naturally formed, and attractively finished example of a rare phenomenon, one that blends aesthetic appeal with geological and lapidary integrity.