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

This 1.15 carat oval purple star sapphire is an exemplar of gemological refinement, presented by The Natural Sapphire Company, with precise measurements of 6.07 by 4.90 by 3.84 millimeters. The stone is fashioned as a traditional cabochon, the profile and dome height carefully calibrated to optimize asterism, and the cut demonstrates attention to crystallographic orientation, with the dome centered to align the star with the corundum c axis. The cabochon surface exhibits an excellent polish, yielding clean specular highlights that enhance the visibility of the star and the stone perimeter. Clarity is described as very very slightly included when evaluated at eye level, indicating minimal limb or surface reaching inclusions, and the overall translucency supports controlled light transmission that feeds the central star without washing the body color. The color intensity is intense, a saturated purple tone that remains vivid under both direct and diffused lighting, and the stone is confirmed as unenhanced, a characteristic that materially affects rarity and premium assessment in the market.

From a technical perspective the asterism in this piece is driven by oriented rutile silk within the corundum lattice, arranged in three intersecting directions, which produces the classical six ray star when light is incident near normal to the dome. The relatively high dome height implied by the 3.84 millimeter depth, in combination with the oval outline, produces a slightly elongated star that reads well on finger and display, and the cabochon cutter has maintained symmetry to avoid star eccentricity. The interplay of silk density and clarity here is notable, because the stone remains very slightly included at eye level while maintaining a sharp, distinct star. This balance is technically difficult to achieve, because excessive silk will obscure transparency and mute body color, while too little will yield a faint or blurred asterism. The intense purple hue indicates a trace element chemistry that departs from classic blue sapphire chromophores, with vanadium and chromium contributions interacting with iron and titanium to yield the violet to purple window within the corundum color gamut.

When placed in historical context this purple star sapphire occupies an interesting niche compared to famous star and color monuments in gem history, because it combines a rare color with classical star mechanics. The Star of India and the Black Star of Queensland are celebrated for their mass and iconic presence, but they do not present the same saturated purple body color seen here, nor do they represent unenhanced Ceylon color chemistry on a small scale. The Logan Sapphire is known for its deep cornflower blue, and the Stuart and Bismarck examples demonstrate how large scale and provenance influence value, however the present stone offers another value proposition. Its uniqueness is not in sheer size, but in the convergence of intense purple saturation, a sharp six ray star, excellent polish, and verified Ceylon origin without enhancement. Collectors who study provenance will recognize that Ceylon corundum commonly delivers a particular velvety clarity and chromatic nuance, and this small but technically superior specimen offers the same artisanal qualities in a wearable form, with the additional assurance of no heat or diffusion treatments.

Practical considerations for setting and care draw on technical attributes that informed cutters and jewelers will appreciate. The oval proportions yield a length to width ratio near 1.24, a versatile outline for rings and pendants, and the modest carat weight of 1.15 carats supports intimate settings that allow the star to orient dynamically with the wearer movement. For optimal asterism display the stone should be set with the dome exposed and the table oriented perpendicular to the expected light source, allowing the star to surface and track as the piece moves. Bezel settings with a raised rim or four prong settings that cradle but do not obscure the dome will protect the cabochon while permitting light interaction. Routine care is straightforward because the corundum hardness provides excellent resistance to abrasion, yet the polished cabochon surface benefits from periodic gentle cleaning to preserve specular highlights and star contrast. For connoisseurs of historically significant gemstones who value natural, unenhanced origin and precise lapidary technique, this Ceylon purple star sapphire from The Natural Sapphire Company offers a compact but highly technical demonstration of asterism and color, a modern counterpart to celebrated historical gems, with a unique value derived from its combination of natural color chemistry, sharp star, and meticulous craftsmanship.