0.48 Ct. Bluish Green Sapphire from Ceylon (Sri Lanka)

This transparent bluish green sapphire weighs 0.48 carat, and presents in an elegant asscher octagon shape with exact dimensions of 4.15 x 3.92 x 3.12 mm. The cutting style is faceted with a classic asscher arrangement, and the polish is graded as excellent. Clarity has been evaluated as very slightly included at eye level, a grade that permits substantial transparency while retaining natural character. Color intensity is medium, offering a balanced bluish green hue that is distinctly Ceylon in character. This stone has undergone routine heat treatment to optimize its tone and stability. The Natural Sapphire Company is pleased to offer this gem with full disclosure of origin, treatment, and measurable proportions, because provenance and precise grading matter to discerning buyers.

The sparkle of this sapphire is grounded in the fundamental crystallography of corundum, and in the careful relationship between refractive properties and facet architecture. Corundum has a refractive index in the range of about 1.76 to 1.77, and a modest dispersion value near 0.018. Those optical constants mean that light entering the stone is strongly refracted and guided through the faceted planes, creating bright returns. Asscher faceting emphasizes step facets and a tiered pavilion that produce a dramatic hall of mirrors effect, with broad flashes of light rather than the pinpoint scintillation typical of modern brilliant cuts. The combination of corundum s intrinsic refractive power, and the asscher s geometric symmetry, yields vivid internal reflections that change distinctly as the stone or the observer moves. Birefringence in sapphire, while low, contributes subtle internal shadowing and split light effects that enhance perceived depth, especially when the cutter has calibrated pavilion angles to use the material s optical behavior to best advantage.

Clarity and polish play an outsized role in the visual performance of a small gem where every facet must work efficiently. The very slightly included grade at eye level means inclusions are minimal and do not materially interrupt the paths of reflected light, so the asscher facets can return clean, contrasting flashes. Excellent polish reduces light scatter at facet junctions and increases the contrast between bright reflections and dark windows, which is essential to the step cut aesthetic. At 0.48 carat and at the given dimensions, the pavilion depth of 3.12 mm has been controlled to balance return of light with overall weight, allowing the medium color intensity to present as lively rather than washed out or overly dark. Heat treatment, a customary enhancement for Ceylon sapphires, has been applied to stabilize and homogenize the hue while maintaining clarity, an approach that experienced cutters at reputable houses employ to reveal the best of a rough crystal without obscuring its natural origin.

For an educated buyer this sapphire represents a confluence of technical merit and aesthetic subtlety, a stone that is simultaneously durable, precise in execution, and resonant with provenance. Origin in Ceylon Sri Lanka carries a long history of producing lively, clear sapphires with a characteristic brightness and a breadth of tone, and this gem exemplifies those qualities in a compact, versatile size. The asscher octagon shape reads as refined and architectural, making the stone well suited to elegant solitaire settings, minimalist bezel mounts, or a delicate halo that emphasizes the step cut geometry. Because of its Ceylon origin, excellent polish, and very slightly included clarity at eye level, the stone holds both collectible and wearable appeal. The Natural Sapphire Company stands behind every specification listed, and we welcome inquiries about setting advice, certificate options, and custom design, because informed choices yield the most satisfying and enduring jewelry.