1.20 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This transparent 1.20 carat asscher octagon blue sapphire measures 5.83 by 5.52 by 3.89 mm, producing a depth percentage of approximately 68.6 percent, a proportion that harmonizes the broad step facets of the crown with a well distributed pavilion depth. The asscher faceting strategy emphasizes concentric square steps, truncated corners, and a generous table, creating a hall of mirrors effect when viewed face up. The result is a controlled play of light, with broad reflective planes giving clean, geometric flashes rather than the pinpoint scintillation associated with brilliant cuts. Clarity is graded as very slightly included at eye level, the inclusions are minor and cleanly localized so as not to interrupt the optical pathways established by the step facets. Polish is excellent, with crisp facet junctions and smooth facet planes that maximize light return and preserve the integrity of each reflective plane. Heat treatment has been applied to enhance tone and saturation, a stable and commonly accepted enhancement that is disclosed for full transparency by The Natural Sapphire Company.

Color presentation on this Ceylon Sri Lanka origin sapphire is described as intense, a saturation that reads as vivid without becoming overly dark, which allows the faceting to work efficiently across the crown and pavilion. The step cut topology in an asscher octagon accentuates color zoning and color saturation by organizing light into broad windows, so that the intense blue is read uniformly across the table and step facets rather than being broken into small flashes. The combination of intense color intensity and the asscher geometry produces a lively face up appearance, with balanced tone and saturation that retains lively luster in both diffuse and direct lighting conditions. The excellent polish and precise symmetry strengthen the perceived color uniformity by minimizing surface scattering, and the truncated corners ease setting stresses while maintaining a clean octagonal silhouette required for high precision mounting. The heat treatment applied to this Ceylon stone is stable under normal wearing conditions and has been executed to optimize the intrinsic hue and saturation while preserving transparency and crystal integrity.

From a durability and daily wear perspective this sapphire benefits from the inherent properties of corundum, which scores 9 on the Mohs hardness scale, second only to diamond in common jewelry materials. This high hardness confers exceptional resistance to abrasion and scratching during routine wear, making the stone particularly well suited to rings, pendants, and bracelets intended for daily use. The crystalline toughness of sapphire generally tolerates normal impacts encountered in everyday settings, but like all gemstones it remains prudent to reduce high force blows and avoid contact with extreme thermal shocks. The heat treatment used to improve color does not compromise structural strength, it is a stable enhancement that does not render the gem more vulnerable under regular conditions. For greatest longevity The Natural Sapphire Company recommends secure settings such as a full bezel for maximum protection, or a well engineered four or six prong mounting if greater table exposure is desired, combined with periodic inspection of the mounting to ensure continued security.

Care and maintenance are straightforward and compatible with daily wear, using warm soapy water and a soft brush for routine cleaning, with ultrasonic cleaning generally acceptable for heat treated corundum but to be used only after consultation when settings contain fragile components. Avoid prolonged exposure to strong acids and prolonged high heat, which are unnecessary for normal care and may affect mounting materials. The stone is ideally suited for contemporary and classic settings that leverage the asscher octagon form, including channel set ensembles where its geometric profile complements linear metalwork, and solitaire designs where its measured depth and intense color read clearly at typical ring table distances. The Natural Sapphire Company provides full disclosure of treatment, origin, and measured proportions, and our gemological team is available to advise on setting selection and long term care to ensure this 1.20 carat Ceylon asscher octagon sapphire performs beautifully as an everyday jewel.