12.37 Ct. Purple Cabochon Sapphire from Ceylon (Sri Lanka)

This specimen from The Natural Sapphire Company is a transparent, cushion shape purple sapphire weighing 12.37 carats, with precise dimensions of 10.94 by 10.92 by 9.49 mm. The cutting style is a sugar loaf cut, exhibiting a high, domed crown and gently rounded pavilion that produces soft, even light dispersion rather than the facet driven scintillation of brilliant cuts. The surface display is exceptionally well finished, with an excellent polish that yields clean reflections across the dome. Color evaluation indicates an intense color intensity, centered firmly in the purple hue range associated with classic Ceylon material, with a tone that reads medium to medium deep and a saturation that gives the stone a vivid appearance under standard daylight viewing conditions. Clarity is graded slightly included as evaluated at eye level, meaning the stone is transparent and free of any obtrusive surface reaching fractures, with minor internal characteristics that do not materially disrupt light transmission or overall visual appeal.

From a gemological and practical perspective the sapphire is unenhanced, no heat treatment or other clarity or color enhancement has been applied, which is an important attribute for collectors and connoisseurs who prioritize natural state material. As corundum, the sapphire exhibits the expected hardness of Mohs 9, and a typical refractive index range for sapphire of 1.762 to 1.770, which contributes to its durability and stable optical performance in jewelry settings. Origin is Ceylon, Sri Lanka, and the material displays the lively, clean violet to purple tones often associated with that provenance, combined with good transparency for a sugar loaf cut. For mounting, the high dome profile of the sugar loaf form benefits from bezel or secure prong settings that protect the girdle and dome, and the excellent polish will present consistently under both direct and diffused illumination. This combination of weight, dimension, cut, untreated status, and Ceylon origin makes this 12.37 carat cushion sugar loaf sapphire a technically distinct and desirable piece for collectors or fine jewelry fabrication.