11.70 Ct. Alexandrite from Ceylon (Sri Lanka)

This exceptional alexandrite is a rare and substantial example of this much sought after gemstone, offered by The Natural Gemstone Company. GRS certified, weighing 11.70 carats, and fashioned into a cushion shape with dimensions of 12.71 x 10.88 x 10.71 mm, this stone presents a classic and authoritative presence. Its color response is described as yellowish green to brownish pink, with a greenish to orangish hue visible in certain lighting, reflecting the complex and alluring color change that defines alexandrite. The gem is transparent, with a mixed brilliant cut that balances scintillation and color saturation, and it has been graded as eye clean when evaluated at eye level, with intense color intensity and an excellent polish. Importantly, there has been no enhancement, and its provenance is Ceylon Sri Lanka, a region celebrated for producing alexandrite with distinctive tonal qualities and a naturally appealing color palette.

To an educated buyer, the technical attributes of this alexandrite explain its premium appeal and lasting value. Alexandrite is prized for its chromium induced color change, which arises from selective absorption of light and strong pleochroic behavior, producing different apparent colors under varying light sources. In this example, the shift from yellowish green in daylight to brownish pink under incandescent light is indicative of a well balanced chromium chemistry and crystal lattice that yields clear and dramatic separation between spectral responses. The mixed brilliant cut is deliberate, designed to maintain and enhance both fire and color change rather than sacrificing one to benefit the other. The cushion shape offers a broad table and generous crown facets, which serve to concentrate and reveal the stone s color, while the pavilion facets and mixed brilliant arrangement return light in a way that amplifies the perceived depth and intensity. Clarity is an important factor for collectors and connoisseurs, and the eye clean evaluation at normal viewing distance means the stone displays no significant inclusions to the naked eye, allowing the color change and brilliance to be experienced without distraction. The excellent polish confirms that facet junctions and surfaces have been finished to high standards, ensuring maximum light performance and tactile quality when set into jewelry.

Origin and treatment status are central to value assessment in the gemstone market, and this alexandrite benefits from a strong combination of natural provenance and no enhancement. Ceylon Sri Lanka has a long history of producing gemstones known for lively saturation and clarity, and Sri Lankan alexandrite often exhibits a slightly warmer palette that can range through greens, blues, and pinks depending on the gem s specific trace elements and local geology. While Russian alexandrite is famed for its vivid and often deep color change, Sri Lankan stones are appreciated for a different but equally compelling expression, often showing a brighter, more luminous green and a softer, appealing pink or raspberry red in incandescent light. The lack of heat treatment, diffusion, or other enhancement preserves the gem s natural attributes and assures collectors that color and clarity are intrinsic to the crystal. Certification by GRS provides an independent verification of these claims, documenting origin, natural state, weight, cut, clarity, and other gemological parameters, which adds provenance and liquidity for future resale. For buyers who seek both beauty and investment quality, a large, untreated, eye clean alexandrite from a reputable origin, accompanied by a respected laboratory report, represents a rare convergence of factors that command attention in the market.

Beyond technical credentials, this alexandrite communicates a statement that resonates on a personal and symbolic level. The rich, bold color appears not only as an optical phenomenon but also as an emblem of personal power and distinction. Wearing a stone that visibly transforms with light conveys dynamism, adaptability, and a nuanced taste for rarity, all qualities associated with leadership and individuality. The substantial carat weight and generous dimensions make this a commanding center stone for a high end ring or pendant, where its color change becomes a living signature on the wearer. For designers and clients seeking a gem that combines scientific interest with aesthetic drama, this alexandrite fulfills both ambitions. It is equally at home in a bespoke, museum quality setting, as it is in a commissioned piece intended for daily wear, provided that appropriate care is observed. Practical considerations such as secure mounting, protection from hard knocks, and gentle cleaning are straightforward, and the stone s excellent polish will maintain luster with routine professional inspections.

As custodians of fine gemstones, The Natural Gemstone Company stands behind the authenticity and ethical sourcing of this alexandrite. We are prepared to provide the full GRS certificate and detailed imagery upon request, and we can assist with bespoke design options to showcase the stone s color change to the fullest advantage. When setting a gem with a pronounced color shift, experienced jewelers often choose metal colors and accent stones that either complement the two primary tones or remain neutral, allowing the alexandrite itself to narrate its story. For long term enjoyment, avoid exposure to harsh chemicals and extreme temperature changes, store separately from harder gemstones to prevent surface abrasion, and have settings checked periodically. This alexandrite presents a rare opportunity to acquire a large, untreated, intensely colored gem with verifiable origin and certification, an item that will appeal to collectors, connoisseurs, and anyone seeking an object that symbolizes personal power, refined taste, and enduring distinction.