2.66 Ct. Emerald from Colombia

This C.Dunaigre certified Colombian emerald presents as a transparent, expertly cut gemstone with a measured weight of 2.66 carats, and precise dimensions of 9.69 x 7.78 x 5.56 mm. The stone is fashioned in a classical emerald cut, exhibiting clean, rectilinear lines and gently clipped corners that emphasize geometric symmetry. Clarity is graded as very slightly included at eye level, indicating minimal and well integrated internal characteristics that do not detract from the overall transparency. Color is described as vivid in intensity, a descriptor consistent with high quality Colombian material, and the finish is confirmed as an excellent polish. Enhancement is standard, reflecting customary, stable treatments used to improve clarity and presentation, and the accompanying C.Dunaigre report documents these attributes and provenance. This combination of weight, dimensions, and optical qualities makes the gem immediately suitable for a prominent center setting while retaining the structural integrity required for daily wear when properly mounted.

The emerald cut’s geometric faceting is the primary factor in the stone’s optical performance. This cutting style employs broad, parallel step facets on both the crown and pavilion, arranged to create layered planes that interact with incident light in a controlled manner. The large, well proportioned table allows photons to enter and traverse the body of the stone, where successive step facets reflect and refract light back through the crown, producing a characteristic play of light that balances depth and breadth. Because the facets are elongated and planar, the result is a pronounced hall of mirrors effect, with repeating flashes of color and tone that change with viewing angle and illumination. The precise facet junctions and calibrated facet angles, together with the excellent polish, permit strong internal reflection and crisp contrast between light and dark zones, maximizing perceived saturation and the vivid hue for which Colombian emeralds are esteemed. The very slightly included clarity grade supports deeper light penetration and multiple internal reflections without the clouding or light leakage that reduces brilliance, thereby allowing the geometric faceting to deliver optimal scintillation and color return.

Practical considerations for setting and presentation follow directly from the stone’s geometry and optical behavior. A mounting that preserves the broad table and exposes the crown to unobstructed light will best showcase the layered facet architecture, while secure prong work at the clipped corners will protect the stone without compromising visual access. Lower profile bezels may mute the hall of mirrors effect, whereas four prong or partial bezel settings will maximize light interaction and surface visibility. The vivid color intensity and substantial face up area make this gem an excellent candidate for a signature ring, a classic solitaire pendant, or a bespoke design that emphasizes symmetry and line. The Natural Emerald Company offers full documentation and provenance through the C.Dunaigre certification, and can advise on mounting options that maintain the integrity of the standard enhancement. In summary, this 2.66 carat Colombian emerald combines precise emerald cut geometry, excellent polish, and very slightly included clarity to deliver a controlled and vibrant light performance, suitable for refined jewelry applications where optical presence and documented origin are priorities.