37.16 Ct. Cabochon Moonstone from Ceylon (Sri Lanka)

Presenting a translucent 37.16 carat oval white moonstone from Ceylon, measuring 25.15 x 8.01 x 11.36 mm, precision fashioned as a high domed cabochon to emphasize adularescence and internal depth. The cutter oriented the lamellar microstructure parallel to the base so the convex dome yields a broad, soft schiller when illuminated from different angles. Clarity is graded very very slightly included evaluated at eye level, with minute needle and pinpoint inclusions located beneath the surface that do not disrupt the adularescent flash or overall translucency. Color intensity reads near colorless, permitting clean contrast between body tone and internal sheen, and the polish is excellent producing smooth transitions across the dome with crisp reflection highlights and no evidence of surface abrasion. The high dome height of 11.36 mm relative to the 25.15 mm length provides a pronounced optical canvas, allowing the adularescence to migrate evenly across the face as light moves, and the oval outline and symmetry have been calibrated to balance optical performance with practical mounting geometry.

From a gemological perspective this material corresponds to classical Sri Lankan adularia with refractive index values in the range 1.518 to 1.526 and low birefringence that contributes to the diffuse, soft moonlight effect. Typical specific gravity near 2.56 and Mohs hardness around 6 to 6.5 are consistent with stable handling in jewelry when properly set. No enhancements have been applied, the piece is natural and untreated, and the cutting and finishing prioritize both aesthetic stability and durability. The relatively large carat weight and elevated dome make this moonstone ideal for statement rings in bezel or high pressure prong settings and for pendant designs where the unbroken cabochon surface can be appreciated. Care recommendations include avoiding ultrasonic cleaning and harsh chemicals, using warm soapy water and a soft brush for cleaning, and storing separately to prevent abrasion. The Natural Gemstone Company can provide additional angle photography and full report grade data on request, and our team is available to advise on bespoke mounting options and protective setting recommendations to preserve the unenhanced surface and sustained adularescence.