18.02 Ct. Cabochon Moonstone from Ceylon (Sri Lanka)

One beautiful translucent 18.02 carat oval brown moonstone from Ceylon Sri Lanka is presented by The Natural Gemstone Company. This gem measures 20.14 x 13.11 x 9.81 mm and is finished as a classic cabochon, a shape and cut that are ideally suited to bring out the best optical properties of moonstone. Moonstone is a member of the feldspar group, formed from alternating layers of orthoclase and albite that scatter light to produce the soft glow known as adularescence. In this brown variety the adularescent effect is delicate and diffuse, enhanced by the stone being translucent rather than fully opaque, which allows light to penetrate and interact with the internal structure. The cabochon dome has been shaped to maximize this inner sheen, while the dimensions and substantial 18.02 carat weight give a commanding face up presence that reads larger than many faceted stones of comparable carat weight because of its broad table and pleasing oval proportions.

Clarity and surface quality are central to evaluating moonstone for collectors and designers. This example is graded very very slightly included at eye level, which means that under normal viewing conditions the stone appears exceptionally clean to the naked eye and that any inclusions are minimal and do not detract from the overall visual appeal. Those minor inclusions can in some cases contribute to the character of the gem without interrupting the adularescence, and they serve as natural fingerprints confirming the gem is unenhanced. The color intensity is described as medium light, a tone that sits between pale and medium brown and which complements a range of design palettes while maintaining the ethereal quality typical of fine moonstone. An excellent polish has been applied to the surface, producing a smooth, lustrous finish that enhances both the surface reflection and the internal glow. Importantly for collectors who value natural material, this moonstone has no enhancement, so its color and optical properties are wholly natural, a factor that often carries premium value for discerning buyers.

From a provenance and market perspective, the origin of Ceylon Sri Lanka adds meaningful context for an educated buyer. Sri Lanka has a long history of producing high quality feldspar gems, and moonstones from this region are prized for their sympathetic balance of translucency and adularescence. When combined with the substantial size and the clean, well polished cabochon form, these attributes make the piece attractive for both bespoke jewelry commissions and specialist collections. Practical considerations for setting and care should be part of any purchase decision. Moonstone has a Mohs hardness of approximately 6 to 6.5 and benefits from protective settings such as bezels or partially recessed mounts that shield the cabochon edge from knocks. Avoid steam and ultrasonic cleaners, and use mild soap and a soft cloth for routine cleaning. For designers the warm brown hue pairs exceptionally well with yellow gold to enrich the tone, and can also provide a soft contrast with rose gold or a subtle pairing with polished silver for a more contemporary effect.

In summary this translucent 18.02 carat oval brown moonstone is a compelling offering for buyers who prioritize natural material quality, provenance, and optical character. The combination of a substantial carat weight, classic cabochon shape, very very slightly included clarity at eye level, medium light color intensity, excellent polish, and the absence of any enhancement supports both aesthetic and long term value considerations. The Natural Gemstone Company is available to provide additional high resolution images, exact light performance views, and assistance in selecting metal and setting options to optimize the gem for a finished piece. If you would like further technical information or to arrange to view the gem, please contact The Natural Gemstone Company and we will be pleased to assist with any specialist requirements.