2.37 Ct. Blue Sapphire from Ceylon (Sri Lanka)

This sapphire is a 2.37 carat oval, measuring 8.88 by 6.90 by 4.63 millimeters, cut in a mixed brilliant style that combines a brilliant crown with a faceted step pavilion to optimize both scintillation and color depth, clarity is graded as very slightly included at eye level, polish is excellent, and no enhancement has been performed, the origin is Ceylon, Sri Lanka, and the piece is offered by The Natural Sapphire Company. The mixed brilliant execution yields a controlled balance between return of white light and preservation of inherent blue saturation, while the oval outline and proportions deliver a visually larger face up area than a round of equivalent weight. The approximate depth ratio is fifty nine percent based on the average diameter, a proportion that supports strong table return without compromising pavilion refraction, and the cutting symmetry and crisp facet junctions indicate meticulous lapidary control consistent with high end Ceylon material. The absence of heat or other treatments ensures natural lattice conditions, which translates into unaltered pleochroic behavior and uncompromised light transmission when compared to heated examples.

Optically this sapphire exhibits the characteristic corundum refractive regime, with relatively high refractive indices and notable birefringence that contribute to strong internal contrast and directional flashes, the mixed brilliant layout enhances lively pinpoint and broad flash scintillation, while the step pavilion facets produce more color oriented flashes that emphasize the medium intensity blue. In practical terms the reflective performance sits between the brilliant dispersion of diamond and the more muted, color centric reflectivity of gems such as tanzanite and blue spinel, diamond will show higher brilliance due to greater dispersion and refractive index, while tanzanite will show richer dichroism with larger, softer flashes, and blue spinel often exhibits cleaner transparency but less internal fire. Compared to other blue sapphires within the corundum family the Ceylon origin typically yields a lighter, more vivid medium blue with an open tone, as opposed to the deeper velvety saturation seen in Pailin or Burmese material, and the untreated nature of this stone allows for dynamic light return that shifts between vivid cornflower blue flashes in direct light and paler sky blue reflections in diffuse viewing.

From a setting and design perspective the stone responds best to prong or low bezel styles that maximize crown exposure to incident light, the excellent polish and precise faceting mean that table and crown facets will act as efficient light collectors, while the step pavilion will leverage internal reflections to deepen perceived color when mounted against warmer metals. For clients seeking maximum brilliance a white metal mounting will accentuate the stone s white light return, whereas a yellow gold surround will enhance the blue to appear richer and more saturated, this sapphire s medium intensity makes it versatile in either context, and its very slightly included clarity grade ensures durability with minimal risk of eye visible inclusions affecting light performance. At The Natural Sapphire Company we carefully assess facet angles and pavilion cut to ensure optimal balance between brightness and color, and we recommend viewing the stone under both natural daylight and incandescent conditions to appreciate its pleochroic shifts and reflective behavior before finalizing a design.