12.10 Ct. Bi Color Ametrine from Ceylon (Sri Lanka)

This transparent bi color ametrine presents as a substantial and carefully executed gemstone, weighing 12.10 carats and fashioned in an oval shape. The dimensions measure 17.05 x 13.16 x 9.31 mm, providing a sizeable surface area for the dual color zoning that defines ametrine as a variety. The cutting style is faceted, employing a Portuguese cut that emphasizes scintillation and internal light return through a complex arrangement of facets. Clarity is graded as very very slightly included, evaluated at eye level, which indicates minimal internal characteristics that do not detract from the stone when viewed without magnification. The polish is evaluated as excellent, reflecting consummate lapidary care in the final finishing stages. The gemstone has undergone a controlled heat treatment enhancement, a standard practice to stabilize color and clarity, and its origin is recorded as Ceylon, Sri Lanka, a region with a long established reputation for producing fine gems.

The color presentation of this ametrine is characterized by a moderate intensity that is rich and bold without being overly saturated, resulting in a composed and refined visual impact. Ametrine naturally displays zones of amethyst purple and citrine yellow, and in this example the boundary between the two hues is clean and attractive, allowing both components to be appreciated individually and as a unified whole. The trade term bi color captures this dual personality, and the Portuguese cut amplifies the interplay of tones across the table and crown facets, creating a dynamic surface that changes with movement and light. In a professional or formal setting the stone conveys a sense of considered choice, and in a more personal context its deep, saturated areas of color act as a visual shorthand for authority and individuality. The rich, bold color functions as a symbol of personal power and distinction, signifying a refined taste for gemstones that combine aesthetic complexity with classical elegance.

From a practical perspective the proportions and cut quality make this ametrine suitable for use in center stone applications where presence and visual balance are important, such as a solitaire ring with a secure setting, a drop pendant designed to showcase the oval outline, or a bespoke brooch where the stone may act as a focal element. The substantial depth of 9.31 mm supports good pavilion facet architecture, contributing to both durability and optimal light performance. The very very slightly included clarity grade supports confident use in jewelry, as the minor inclusions are not apparent at normal viewing distances and do not compromise structural integrity. Heat treatment has been applied with the purpose of enhancing stability, and the origin from Ceylon, Sri Lanka provides context for expected material characteristics and historical provenance. The Natural Gemstone Company stands behind the descriptive details provided here, and this ametrine is presented as an example of thoughtful gem selection aimed at collectors and designers who value clarity of information, technical quality, and the expressive potential of color.