13.53 Ct. Yellow Tourmaline from Ceylon (Sri Lanka)

This listing presents a single transparent yellow tourmaline weighing 13.53 carat, with precise dimensions of 13.72 by 13.62 by 10.51 mm. The stone is fashioned in a cushion shape, and the cutting style is faceted with a mixed brilliant cut. Clarity is graded as eye clean when evaluated at eye level, and the gem displays medium color intensity in its yellow hue. The polish is assessed as excellent, contributing to its overall light performance and surface quality. The piece originates from Ceylon, Sri Lanka, and has undergone heat treatment as a stable enhancement to optimize color and visual appeal. The Natural Gemstone Company provides this gem with full disclosure of these attributes.

The mixed brilliant cut in a cushion outline produces a balanced interplay of brilliance and fire, combining elements of both step cutting and brilliant facet patterns. Faceting is executed to maximize return of light from the pavilion while preserving the cushion silhouette, resulting in lively scintillation across the table and crown. The excellent polish ensures clean facet junctions and a smooth girdle, which supports precise setting and consistent optical behavior. Transparency is a strong attribute of this specimen, and the eye clean clarity grade means that the stone will read clean in most viewing contexts, allowing designers to exploit its visual impact without concern for visible inclusions compromising the design.

At 13.72 by 13.62 mm across the table and 10.51 mm in depth, this tourmaline occupies a substantial physical volume that is well suited to serve as a primary center stone in custom jewelry. The near equal length and width establish a symmetrical cushion form that adapts well to a range of mounting styles, including prong settings that emphasize the table, bezel settings that provide extra protection for daily wear, and halo arrangements that enhance perceived size and add contrast. The depth of 10.51 mm supports durable bezel walls or substantial prong shoulders, and the 13.53 carat weight gives a tangible presence appropriate for solitaire rings, cocktail rings, pendant locks, statement earrings, and bespoke brooch designs. Designers seeking a warm yellow focal point will find the size and shape conducive to creating pieces that balance visual prominence with ergonomic wearability.

Tourmaline is a durable gem for many types of jewelry, with a hardness that typically ranges from 7 to 7.5 on the Mohs scale, and with no true cleavage planes reducing risk of catastrophic splitting, though care is advised to avoid hard knocks. The heat treatment applied to this stone is a common and stable enhancement intended to refine tone and clarity, and it does not require special handling beyond the usual precautions for colored gemstones. Origin from Ceylon, Sri Lanka, situates this specimen within a recognized gem producing region, and provenance may be relevant to collectors and designers seeking documented sources. For custom work, considerations include protective settings for daily wear, the potential for accent stones and metal contrasts to complement the medium yellow intensity, and secure mounting that respects the stone dimensions and facet pattern. The Natural Gemstone Company is available to provide additional technical details and images to assist in design planning, and to coordinate selection with specific setting preferences and fabrication requirements.