1.15 Ct. Yellow Sapphire from Ceylon (Sri Lanka)

This 1.15 carat transparent oval yellow sapphire presents precise proportions and a finely executed mixed brilliant cut, combining optical performance with classic gemological attributes. The stone measures 7.20 x 5.92 x 3.09 mm, yielding a length to width ratio of approximately 1.22, which produces a compact elegant silhouette that concentrates color evenly across the table. Color is graded as light intensity in a pure yellow hue, and clarity is slightly included when evaluated at eye level, indicating the presence of natural internal features that do not compromise transparency. The polish is excellent, which means facet surfaces and junctions are crisp and smooth, optimizing light return and preserving sharp facet contrast under magnification. This sapphire is heat treated, a stable and widely accepted enhancement used to improve color uniformity and to reduce the visibility of certain growth related inclusions. Origin is Ceylon Sri Lanka, a provenance that is known for producing sapphires with lively color and a combination of fine optical character and natural inclusions that testify to origin and natural growth.

Technically the mixed brilliant cut employed here merges the scintillating dynamics of a brilliant pavilion with deliberate crown geometry to control color saturation and windowing. The pavilion returns light in a pattern of small bright flashes, while modified crown facets manage the face up color, preventing excessive darkening at the ends that can occur in elongated shapes. With a refractive index of corundum in the range of 1.760 to 1.770 and birefringence around 0.008, precise facet angles are essential to maximize internal reflection and minimize light leakage. The excellent polish ensures that dispersion and scintillation are not dampened by surface friction, and the high transparency of this stone allows the subtle play of light to reveal its internal features cleanly. Pleochroism in yellow sapphires is generally weak, yet the mixed brilliant faceting and compact ratio allow the single hue to remain consistent when the gem is viewed from different angles, enhancing wearable appeal in rings and pendants.

From a durability and treatment perspective this sapphire is exceptionally well suited to become an heirloom. Corundum registers 9 on the Mohs hardness scale and has a specific gravity near 4.00, properties that translate to excellent resistance to abrasion and long term retention of polish and facet integrity. Heat treatment applied to Ceylon sapphires is stable under normal wear conditions and does not require special handling beyond standard jewelry care. Slight inclusions observed at eye level provide structural context that can act as identification markers during future appraisals, while the excellent polish reduces surface microabrasion, slowing the rate of wear. For secure daily wear settings a well engineered prong mounting that protects the girdle and corners is recommended, or a bezel setting for added security where the metal rim can guard against edge strikes while still presenting the table for maximum color face up. Routine maintenance using warm soapy water and a soft brush will preserve luster, and professional checking of settings and periodic ultrasonic cleaning under expert advice will maintain the gem for generations.

When considering an investment in a gem to pass down, provenance, stability, and intrinsic character are paramount, and this Ceylon yellow sapphire embodies each of those qualities. The natural inclusions that qualify the clarity as slightly included create a unique internal fingerprint, enabling future identification and carrying with them the narrative of natural formation and origin. The classic oval shape with a balanced mixed brilliant cut offers timeless aesthetics that can be reset across eras, moving from a traditional ring to a modern pendant or heirloom brooch without losing inherent value. The Natural Sapphire Company stands behind the technical assessment and curatorial care of this gem, and can provide guidance on bespoke settings and documentation to accompany provenance, ensuring the stone s story is preserved. With its robust corundum hardness, stable heat enhancement, and precise cutting and polishing, this 1.15 carat Ceylon yellow sapphire is a candidate to anchor a family legacy and to be enjoyed across multiple generations.