1.36 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This specimen is a transparent round blue sapphire weighing 1.36 carats, with precise dimensions of 6.42 by 6.43 by 4.03 millimeters, and a faceted mixed brilliant cut that combines the scintillation of a brilliant with the color retention of a step influenced pavilion. The cutting style has been executed to a high degree, producing balanced light return and a pleasing face up appearance, and the polish is excellent, providing crisp facet junctions and a smooth table that enhances both brilliance and color. Clarity has been graded as slightly included when evaluated at eye level, which means there are minor natural features visible under close inspection, yet they do not materially detract from the gem when set, and they often serve as internal fingerprints of natural origin. Color intensity is vivid, showing a deep saturated blue that shifts subtly with viewing angle, and the stone has been heat treated, a widely accepted enhancement in the trade that improves color and clarity in a permanent and stable manner when performed under controlled conditions.

The origin of this sapphire is Ceylon, the historical name for Sri Lanka, and that provenance contributes significantly to its desirability and value. Ceylon sapphires are renowned for yielding a spectrum of blue tones from cornflower and medium strong blues to the vivid, saturated hues seen in this stone, often with exceptional transparency and lively internal light play. Geological conditions in Sri Lanka, including the age and chemistry of the host rocks, promote the growth of corundum crystals with favorable trace element balances and fewer dense inclusions, which translates into cleaner, more vibrant gems that respond well to precision cutting. Historically Sri Lanka has been a principal source of fine corundum for centuries, and contemporary collectors and connoisseurs place a premium on the provenance because it suggests a combination of aesthetic quality and a traceable supply chain. For an educated buyer, origin matters because it informs expectations regarding color palette, typical inclusion types, and long term market demand, and Ceylon origin often commands higher interest from those who prioritize character and provenance in their gemstone acquisitions.

From a practical and valuation perspective, this sapphire represents a compelling balance of weight, cut, color, and durability. At 1.36 carats and a round shape, it is well suited for classic solitaire settings or as the primary stone in a bespoke design, where the mixed brilliant cut will deliver scintillation while preserving depth of color. Corundum rates a nine on the Mohs hardness scale, offering everyday wearability for rings and other jewelry, yet proper mounting and occasional professional cleaning will maximize its longevity. The slightly included clarity grade can moderate price relative to fully eye clean stones, but for many buyers those minor internal features are preferable to aggressive clarity enhancement, because they confirm natural origin and do not compromise the gem ornate appearance. Heat treatment, when disclosed, is considered an acceptable enhancement that improves visual performance without reducing structural integrity, and it is standard practice for many fine blue sapphires. At The Natural Sapphire Company we document treatments and origin, and we provide guidance on setting, care, and valuation so that clients can purchase with confidence, knowing the combination of Ceylon provenance, vivid color intensity, precise mixed brilliant cutting, and an excellent polish creates a sapphire that is both visually arresting and robust as a wearable heirloom.