3.12 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This 3.12 carat oval blue sapphire presents dimensions of 9.80 by 7.53 by 5.20 mm, a measured proportion that yields an elegant length to width ratio of approximately 1.30. The gemstone originates from Ceylon Sri Lanka, a deposit long regarded for producing sapphires with lively tonal range and clear saturation. The stone is transparent with a clarity grade described as very slightly included when evaluated at eye level, indicating inclusions that do not detract from face up beauty and that often add to the natural character without compromising light return. The sapphire has been heat treated, a standard and stable enhancement that improves color saturation and reduces certain inclusions through controlled thermal diffusion, and it has been finished to an excellent polish that ensures mirror sharp facet junctions and minimal surface disturbance. The cut style is a mixed brilliant, executed on an oval outline, combining precision faceting with proportions optimized to balance color distribution and optical performance, and the presentation of the piece reflects the quality standards you associate with The Natural Sapphire Company.

The mixed brilliant cutting style on this oval sapphire is engineered to reconcile the competing demands of brilliance and color. On the crown the facet architecture employs a traditional brilliant schema with kite and star facets radiating from a well centered table, these facets are cut to angles that favor lively scintillation and broad flash dispersion. The pavilion is organized to complement the crown with a combination of brilliant pavilion facets and controlled facet sizes that return deep blue wavelengths while minimizing washout of tone. The result of this mixed approach is a dynamic interplay between pinpoint scintillation and larger, velvety flashes, allowing the stone to exhibit both scintillation for movement and stable color for depth. Girdle execution is consistent and even, preventing unnecessary light leakage and allowing secure setting. The excellent polish enhances facet transparency and sharpness, producing crisp facet junctions that contribute to precise light behavior, and the symmetry of the oval outline ensures that light is distributed evenly across the table and pavilion, avoiding lopsided color windows or dead zones.

Color evaluation for this sapphire is focused and technical, described as vivid intensity with saturated hue, characteristics that are particularly prized in Ceylon material. The primary hue registers as a pure to slightly purplish blue depending on viewing conditions, and the saturation is strong enough to read as vivid while maintaining enough tone to display depth without appearing too dark. Pleochroic behavior is present and measurable, the stone exhibiting variation between deep blue and a slightly more violet or in some angles a subtly greener blue, an effect that is emphasized by the oval orientation and facet layout. Under natural daylight, which contains a broad spectrum with strong blue components, the sapphire will present its truest vivid blue, with rich pavilion depth and lively table flashes. Under cooler LED light sources that emphasize blue wavelengths, the stone will appear intensely saturated with a crisp, electric blue presence and sharp scintillation from the brilliant facet set. Under warm incandescent or halogen lighting, which shifts the balance toward longer wavelengths, the sapphire will show a slightly warmer blue, with the potential for a softer, more velvety appearance and enhanced depth as the pavilion returns concentrate the blue tones. In mixed ambient lighting scenarios you will notice a complex behavior where small flashes of lighter blue and deeper velvety areas alternate as the stone or the observer moves, a direct result of the mixed brilliant cut and the crystal orientation.

Practical considerations for jewelry use and long term appearance are straightforward and technical. Given the 3.12 carat weight and the 9.80 by 7.53 by 5.20 mm dimensions, the stone sits comfortably for a center in a ring, pendant, or bespoke piece where the depth of color is to be showcased, and the even girdle and excellent polish facilitate secure bezel or prong settings while minimizing light loss. The very slightly included clarity grade means that inclusions are unlikely to affect structural integrity, but normal care is recommended to avoid hard knocks on the facet edges and girdle during wear. Routine cleaning with warm soapy water and a soft brush will maintain brilliance, while professional ultrasonic cleaning may be used with caution after consultation, given the heat treated nature of the stone. At The Natural Sapphire Company we document origin, treatment, and cut details so that you can match this sapphire with complementary stones or mounting styles that will maximize its optical potential. The mixed brilliant oval will excel in settings that allow light to enter from multiple angles, and in such mountings the stone will show both vivid saturated table color and lively scintillation, a combination that appeals to connoisseurs who value precision cutting, natural material provenance, and consistent optical performance.