4.38 Ct. Grey Star Sapphire from Ceylon (Sri Lanka)

This exceptional translucent grey star sapphire from Ceylon offered by The Natural Sapphire Company weighs 4.38 carats and presents a precise round shape with measurements of 8.13 x 7.73 x 6.57 millimeters, a profile that combines presence with wearable proportions. The gem is fashioned as a cabochon, a traditional cutting style that embraces the internal structure of a star sapphire rather than attempting to conceal it. Its medium intense color provides a sophisticated neutral palette that allows the white asterism to contrast crisply against the body of the stone. Clarity is described as very very slightly included when evaluated at eye level, a realistic assessment for this gem type which indicates that blemishes are minimal and do not obstruct the visual effect. The polish is excellent, a crucial attribute for star stones, because the smooth, lustrous surface permits the asterism to glide across the dome without distortion.

Although not faceted in the conventional sense, the geometric shaping of the cabochon, its dome profile and symmetry act like engineered geometry to maximize light play and to produce a strong six ray star. The asterism itself is formed by parallel arrays of fine rutile needles that intersect the incoming light, and when the cabochon dome is cut with correct curvature and axial alignment, those internal silk structures generate a centered and mobile star. With a height of 6.57 millimeters this specimen maintains an optimal ratio between dome height and base diameter, which enhances the contrast and sharpness of the star as the gem or the light source is moved. The excellent surface polish completes the optical system, reducing surface scattering and allowing the star to appear crisp, well defined, and sharp at a variety of viewing angles.

For the educated buyer this stone represents a convergence of desirable factors, provenance, and treatment status. Sourced from Ceylon, Sri Lanka, a historic and highly respected locale for sapphires, and offered without any enhancement, this star sapphire carries a premium compared with heat treated or otherwise modified material. The medium intense grey body color paired with very very slightly included clarity means the gem balances visual purity with the rutile content required to produce asterism, making it both visually striking and structurally characteristic. At 4.38 carats the stone is substantial enough for a prominent ring or pendant, and the round cabochon form is particularly versatile for classic settings that showcase the moving star. We at The Natural Sapphire Company recommend settings that protect the girdle and dome while allowing light to reach the crown, such as bezel or low profile prong mounts, and we advise gentle cleaning with warm soapy water and a soft brush to maintain the polish and star clarity. For collectors and connoisseurs seeking an untreated Ceylon star sapphire with clear documentation of its optical properties and excellent surface finish, this gem is an authentic and rewarding example.