10.74 Ct. Cabochon Moonstone from Ceylon (Sri Lanka)

This is a rare, high quality, translucent white moonstone, weighing 10.74 carats, presented in a classic oval shape, with dimensions recorded as 1.00 x 1.00 x 1.00 millimeters, cut as a cabochon, clarity graded as eye clean at normal viewing distance, near colorless in body tone, and finished with an excellent polish. The piece is completely natural, with no enhancements reported, and its origin is Ceylon Sri Lanka, a region renowned for producing moonstones with finely developed adularescence and clean body color. At 10.74 carats this specimen immediately occupies a different category to the more common smaller sizes, and when combined with its near colorless intensity and translucency it becomes especially uncommon compared to the typical white moonstones that display stronger body color or more visible inclusions. The Natural Gemstone Company offers this piece as a collector grade example, exhibiting the combination of weight, optical quality, and lapidary execution that discerning connoisseurs seek.

From a lapidary and technical perspective this moonstone demonstrates precise cabochon craftsmanship. The oval outline is symmetrical, the dome is proportioned to maximize the characteristic adularescent sheen, and the base is smoothly flattened to allow secure bezel seating with minimal light leakage. The cutter aligned the axis of the cabochon with the internal lamellar microstructure to enhance the internal light scattering phenomenon, producing a clean, uniform sheen across the face with minimal zoning. The polish is described as excellent, indicating a controlled final lapping stage and a fine polishing medium that left no visible abrasions or polish haze under loupe examination. The eye clean clarity grade means that at typical viewing distances there are no inclusions or fractures that distract from the optical effect, although under magnification one may observe the typical layered intergrowths responsible for adularescence. No clarity enhancing treatments or heat applications were used, so the adularescence and translucency are fully natural and preserved in the finished gem.

The combination of 10.74 carat weight, near colorless body tone, translucent clarity, and superior cabochon execution makes this moonstone materially rarer than comparable specimens in the marketplace. Most white moonstones that reach larger weights exhibit more milkiness or opaque zones that diminish adularescence, or they require color adjustment through coating or other enhancements. A naturally near colorless, translucent moonstone of this size and eye clean clarity is therefore a notable find. For designers and collectors this gem is ideal for a high profile solitaire pendant where the broad oval face can display the sheen dynamically, or for a statement ring where the orientation can be fixed to showcase the flash across the finger motion. Careful setting in a protective bezel or with modest prongs is recommended, given moonstone hardness in the range of approximately 6 to 6.5 on the Mohs scale, and standard precautions should be observed to avoid sharp blows and prolonged exposure to heat.

The provenance of Ceylon Sri Lanka further enhances the appeal, as local material is often selected by master cutters familiar with the specific cleavage and lamellar directions that produce the best adularescence, and The Natural Gemstone Company is pleased to present this rare example from that source. For collectors who prioritize natural, untreated specimens with technical precision in cut and finish this moonstone represents both aesthetic and technical merit, and it occupies a category that is seldom available on the market. If you require further technical data, setting recommendations, or high magnification imagery to assess the adularescence orientation prior to commissioning a bespoke mounting, The Natural Gemstone Company will provide measured documentation and consultative guidance to ensure the gem is showcased and protected according to professional lapidary and jewelry standards.