3.46 Ct. White Cabochon Moonstone from Ceylon (Sri Lanka)

This specimen is a translucent white moonstone, weighing 3.46 carats, fashioned into an oval cabochon with exact dimensions of 12.73 by 9.58 by 4.34 millimeters. The oval outline yields a length to width ratio of approximately 1.33 to 1, a proportion that balances visual elongation with surface area to maximize the play of adularescence. The cabochon cut is deliberately shallow to moderate, providing a domed table that presents adularescent effect across the broad face, while the pavilion is carefully controlled to retain sufficient depth for stable mounting. Clarity is graded slightly included at eye level, with internal features consistent with natural feldspar intergrowths rather than evidence of fracture filling or other laboratory enhancement. Color intensity is assessed as near colorless, creating a neutral body color that permits blue white sheen and internal glow to read cleanly under varied lighting. The polish is excellent, with a smoothly finished dome and a well executed girdle that facilitates secure bezel or prong setting. No enhancements have been applied, and provenance is recorded as Ceylon Sri Lanka, a source recognized for high quality moonstone specimens and artisanal cutting traditions.

From an optical and gemological perspective this moonstone exhibits classic adularescence arising from its perthitic microstructure, where alternating lamellae of orthoclase and albite scatter incident light to create a billowed sheen. The cabochon geometry has been optimized to align that lamellar plane parallel to the table, thereby producing a broad, uniform flash rather than a fragmented or pinpoint shimmer. The translucent body permits subsurface scattering which contributes to the stone appearing to glow from within rather than simply reflecting surface light. Slight inclusions are present and observable under close inspection at eye level, these inclusions are typical oriented platelets or narrow fluid filled channels that can interact with the adularescence to produce subtle banding and unique internal patterning. The excellent polish minimizes surface diffusion of light and ensures that the sheen is crisp across the dome, while the oval symmetry and consistent profile indicate careful lapidary control during the cutting process. The measured height of 4.34 millimeters gives sufficient dome to preserve adularescent depth while avoiding an excessively high silhouette that would be impractical for everyday wear.

Durability considerations are central when specifying settings for daily wear, and this moonstone should be treated with informed care. As a potassium sodium feldspar its Mohs hardness is approximately 6 to 6.5, making it more susceptible to abrasion than corundum or quartz. It has two directions of good cleavage across crystallographic planes inherent to feldspar, which increases vulnerability to chip or cleavage under sharp lateral impact. Thermal shock can also pose a risk because abrupt temperature changes may induce stress along cleavage planes. For these reasons The Natural Gemstone Company recommends settings that offer physical protection and reduce exposure of the dome to direct strikes. A full bezel with a low profile, or a protective halo and partial bezel that cradles the girdle, are preferred for rings that will be worn daily. For pendants and earrings where impact risk is lower, shared prong settings with supportive gallery structure can provide sufficient security while allowing more light to enter the stone. Ultrasonic cleaners and steam cleaning are not advised owing to potential ingress of cleaning fluids into internal fissures and the risk of thermal stress. Safe cleaning methods include a soft brush with warm soapy water, gentle agitation, and a soft lint free cloth to dry and polish the surface. Routine inspection of settings is advised to ensure that prongs or bezels remain tight, and to detect any early signs of edge chipping or surface abrasion.

Practical applications and mounting recommendations align with the stone dimensions and optical character. At 12.73 by 9.58 millimeters and 3.46 carats the cabochon represents a commanding center for a ring of statement scale, while remaining balanced for drop pendants and single stone earrings in matched pairs if a companion stone is selected. The near colorless body color and translucent character make this moonstone particularly versatile with a range of metals, with cooler metals such as sterling silver and platinum accentuating blue white adularescence, and warm yellow gold offering complementary contrast for a vintage aesthetic. Given the slightly included clarity grade the stone benefits from settings that reduce exposure to hard contact and that incorporate protective shoulders or galleries to buffer lateral impacts. The Natural Gemstone Company sources this specimen from Ceylon Sri Lanka and offers it untreated, allowing the cutter applied polish and the natural microstructure to define its optical signature. For customers seeking daily wearable jewelry we provide bespoke mounting guidance, including recommended bezel depths to preserve the dome, suggested metal thicknesses around the girdle for impact resistance, and practical cleaning and maintenance instructions to retain the gemological integrity and visual performance of the stone over time. Please contact The Natural Gemstone Company for high resolution imagery, setting mock ups, or custom design consultation to ensure that this moonstone performs reliably and beautifully in the intended daily wear application.