16.55 Ct. Orange Sapphire from Ceylon (Sri Lanka)

This listing presents one transparent 16.55 carat emerald cut orange sapphire, cut in a faceted emerald shape and measuring 14.06 x 12.33 x 9.15 mm. The stone displays intense color intensity with a warm orange hue that remains evenly distributed across the table and pavilion. Clarity is described as very slightly included when evaluated at eye level, indicating minor internal features that do not materially interrupt the gem eye appeal. The polish is excellent, with crisp facet junctions and a smooth table that enhance surface reflection and luster. This sapphire is heat treated, a common and stable enhancement for color saturation and clarity, and the material is from Ceylon Sri Lanka, a provenance known for producing clean, vividly colored corundum. The Natural Sapphire Company presents this gem as an example of a large, gem quality colored sapphire that balances weight, color, and optical performance.

From an optical standpoint the material is corundum, which places its refractive index in the range typically cited for sapphire, and that inherent refractive power contributes to strong light return and a lively appearance despite modest dispersion compared with gemstones like diamond. The emerald cut used here emphasizes broad step facets and parallel facet planes, creating broad flashes of color and brightness, often called hall of mirrors effects, rather than the intense scintillation seen in brilliant cuts. The excellent polish and precise faceting maximize the internal reflection paths, producing even, bold flashes across the table and step facets that draw attention to the stone color and clarity. The intense orange color absorbs selectively across the visible spectrum which deepens the perceived saturation, and the step cut concentrates the color while revealing the stone transparency. Surface luster is vitreous, and under daylight or warm lighting the pavilion and crown interact to yield symmetrical return of orange tones, with occasional lighter flashes where facet orientation catches specular reflection.

When compared with other gemstones in the same color family and category, the reflective character of this emerald cut orange sapphire stands apart in specific ways. Against brilliant cut sapphires of similar weight, the step cut produces broader, more architectural flashes of light and less rapid scintillation, so the visual emphasis is on color and clarity rather than on a peppery sparkle. Compared with spinel of similar hue, which has a slightly lower refractive index and typically softer brilliance, this sapphire returns light with a bit more intensity and a firmer edge to facet reflections. Against spessartine garnet which often exhibits higher dispersion and therefore greater fire, the sapphire shows less spectral flash but offers stronger overall return due to corundum refractivity and a cleaner, more even color field. Compared with padparadscha sapphire and other pink orange corundum varieties, this Ceylon orange tends to show warmer, more saturated orange without the pink overtone, and the emerald cut serves to present a pure orange plane rather than a mixed color play. Heat treatment in this sapphire improves color uniformity and clarity without diminishing the reflective qualities, and the excellent polish ensures that facet contrast and mirror reflections remain crisp relative to many untreated or poorly finished stones.

Practical considerations for setting and daily wear follow directly from these optical characteristics and physical proportions. The substantial 14.06 x 12.33 mm table and 9.15 mm depth provide a commanding presence in a ring or a pendant, and the step cut is especially well suited to settings that frame the stone with clean lines, such as cathedral or bezel variants that protect the pavilion while allowing the table to present flat and even light return. Because step cuts show color and clarity clearly, the very slightly included clarity grade means inclusions will usually be inconspicuous when mounted, but placement and orientation in the setting can minimize their visibility. The heat treatment reported here is stable under typical wear conditions, and normal jewelry care with periodic professional cleaning will maintain the excellent polish and brilliance. The Natural Sapphire Company offers this sapphire with detailed imagery and provenance information so that design planning can reflect the stone optical strengths, and our gem specialists can provide guidance on settings that preserve the broad, luminous flashes and intense color that define this exceptional orange sapphire.