11.45 Ct. Cabochon Moonstone from Ceylon (Sri Lanka)

This beautiful translucent brown moonstone weighs 11.45 carat, and presents an elegant oval shape with classic cabochon cut proportions. The gem measures 18.13 x 13.01 x 6.73 mm, dimensions that place it well into the category of large moonstones suitable for a central statement element in a ring, pendant, or brooch. The cabochon cut has been executed to highlight the stone body, to showcase its adularescent glow, and to provide a broad surface that reads well at normal viewing distances. The color is an intense brown, yet the translucency allows light to penetrate and interact with the internal structure, producing a soft floating sheen when moved under light. Weighing 11.45 carat, this moonstone occupies a size range that is uncommon for top quality material from classic sources, and the combination of size, shape, and cabochon symmetry is what makes it immediately suitable for designs that aim to command attention without appearing ostentatious.

From a gemological perspective, this specimen carries a clarity grade of very slightly included when evaluated at eye level, a practical and meaningful standard for wearable gemstones. Very slightly included indicates that inclusions are minor, do not disrupt the gem surface, and are difficult to detect without close inspection, leaving the overall visual appeal strong and uninterrupted. The excellent polish enhances light return and tactile quality, creating a silky surface that allows adularescence to glide across the gem as it is moved. Adularescence is the hallmark optical phenomenon of moonstone, caused by the intergrowth of orthoclase and albite lamellae, and in this stone the lamellar structure presents cleanly enough to generate a pronounced sheen despite the brown body color. The stone has received no enhancement, meaning there is no heating, dyeing, coating, or other treatment applied, a factor that educated buyers value because it preserves the natural character and long term stability of the gem.

The origin of this moonstone is Ceylon Sri Lanka, a source with a long historical reputation for fine feldspar material. Ceylon moonstones are known for clean adularescence, balanced body tones, and consistent material quality. Provenance from Sri Lanka adds both aesthetic and marketplace value, because collectors and connoisseurs recognize the island as a classic locality with established mining and cutting traditions. For the informed buyer, the combination of provenance, natural state, and physical parameters such as 11.45 carat weight and 18.13 x 13.01 x 6.73 mm dimensions contributes to rarity and desirability. Large, translucent, untreated moonstones with intense color and very slight inclusions are not commonly available in the retail market, making this specimen notable for bespoke jewelry projects or private collections. From an investment and preservation standpoint, the lack of enhancement reduces future uncertainty about fading or stability, and the excellent polish means the stone will present well under examination, in photography, and in daily wear when set using appropriate protective design choices.

Because of its size and clarity this moonstone is particularly well suited to a statement piece that relies on a single dominant focal gem. In a ring design it will radiate presence as a cocktail or signet style center, while in a pendant it can act as a luminous focal point suspended close to the wearer where light will play across the surface. The cabochon profile and excellent polish are ideal for settings that emphasize surface reflection and movement, and the intense brown body color pairs beautifully with warm metals such as yellow gold and rose gold, as well as with darker metals that create dramatic contrast. Practical considerations for a piece intended for regular wear include a protective bezel or partial bezel to guard the crown of the cabochon, and a secure back setting to protect the girdle given the stone dimensions. Routine care involves gentle cleaning with warm soapy water and a soft brush, avoidance of harsh chemicals and ultrasonic cleaners, and removal during rigorous activity. The Natural Gemstone Company stands behind the authenticity and sourcing of this moonstone, and we provide detailed documentation on request to support provenance and grading information. For a discerning buyer seeking a natural, untreated, and visually commanding moonstone that combines impressive size with clean clarity and classic origin, this 11.45 carat oval cabochon from Ceylon Sri Lanka represents a rare and compelling option.