18.71 Ct. Cabochon Moonstone from Ceylon (Sri Lanka)

One striking and rare specimen available from The Natural Gemstone Company is an 18.71 carat, oval shaped brown moonstone, with dimensions of 21.73 by 14.77 by 7.89 mm, presented in a classic cabochon cut. This stone is semi translucent, exhibiting an intense color intensity that gives it a warm, earthy presence that is both subtle and commanding. Clarity has been graded as very very slightly included, evaluated at eye level, which means the gem reads as eye clean in everyday wear while retaining natural internal character that collectors appreciate. The polish is excellent, creating a smooth, mirror like surface that enhances light play and surface luster. There has been no enhancement to this moonstone, it is fully natural, and its origin is Ceylon Sri Lanka, a source renowned for producing high quality moonstones with fine color and strong overall appeal. The cabochon form is the ideal cut for moonstone, allowing the stone to display its internal qualities and tonal depth in a way that faceting cannot, resulting in a rich, tactile gem that will speak to both jewellers and final customers.

When comparing this brown moonstone to other moonstones and similar gems on the market, several advantages stand out. Many market offerings emphasize adularescence with white or blue sheen, but brown moonstones of this size and intensity are less common, creating an immediate rarity premium and visual distinction. Compared with smaller or heavily included moonstones, this 18.71 carat piece combines significant carat weight with a very very slightly included clarity grade, a balance that is hard to find at this size. Some suppliers market treated or dyed moonstones to achieve more uniform color, and other sellers may offer lower grade stones at similar prices, but the absence of enhancement here means the color and tone are genuine to the crystal, which supports long term value and authenticity. The excellent polish and true cabochon shaping maximize the stone surface and make it ideal for settings that emphasize the gem itself, without the need for additional treatments or enhancements. Compared with other gemstones that occupy a similar visual space, such as labradorite or certain types of jasper, this moonstone offers a smoother, more ethereal translucence and a richer sense of depth.

For designers and discerning buyers who seek an exceptional center stone, this brown moonstone offers versatility and superior visual impact. Its substantial dimensions and weight are ideal for statement rings, bold pendants, or bespoke cocktail pieces, and the oval cabochon silhouette is easy to set in bezel or classic prong customs that protect the domed surface. The warm brown color palette works beautifully with yellow gold and rose gold for a vintage inspired appearance, and it also pairs elegantly with sterling silver or palladium for a more contemporary, minimalist presentation. Because this stone is untreated, it will retain its natural character through generations with appropriate care, and its semi translucent body allows for interesting backlighting effects when set in open backed mountings. For collectors, the combination of origin from Ceylon Sri Lanka, significant carat weight, and eye level clarity makes this stone an attractive acquisition compared with many off the shelf, mass produced cabochons.

Choosing The Natural Gemstone Company means selecting a piece that has been sourced and described with precision, and that offers a clear advantage over more common or altered market alternatives. We focus on honest representation, rigorous selection criteria, and the presentation of natural, unenhanced material, which translates to greater long term value for the buyer. This brown moonstone stands apart from smaller, treated, or heavily included stones, because it combines size, color intensity, and an excellent polish in an untreated state from a reputable origin. For anyone deciding between mass market options and a genuinely distinctive gem, this moonstone offers both aesthetic superiority and a defensible investment in quality. If you are creating a bespoke piece or expanding a curated collection, this stone provides a unique look that is difficult to replicate, and our team is available to discuss matching settings, design ideas, and logistical details to help you bring this natural treasure into a finished piece.