3.90 Ct. Cabochon Moonstone from Ceylon (Sri Lanka)

This listing describes a single translucent 3.90 carat oval white moonstone, cabochon cut, with precise dimensions 10.43 by 7.80 by 6.16 millimeters. The profile is a high dome cabochon engineered to optimize adularescence, the optical sheen produced by the submicroscopic layering of albite and orthoclase lamellae within the feldspar structure. Clarity is graded as very very slightly included at eye level, indicating minute internal platelets or needle like inclusions that do not detract from face up appearance under normal viewing distances. Color intensity is classified as colorless with an even translucent body tone, and the polish is excellent, yielding crisp light return and minimal surface diffusion. No enhancements have been applied, the gem is natural and untreated, and origin is certified as Ceylon Sri Lanka by The Natural Gemstone Company. Typical physical parameters relevant to handling and setting include a Mohs hardness approximately 6 to 6.5, low birefringence, and a specific gravity in the mid twos, characteristics that inform mounting and care recommendations.

From a lapidary and design perspective the cutting and finishing decisions are deliberate, the oval outline and dome height preserve structural integrity by aligning the cabochon curvature with predominant cleavage directions, thereby reducing the risk of cleavage related damage during setting. The chosen dome to diameter ratio yields a three dimensional display that concentrates the adularescent flash under diffuse light, and the excellent polish enhances the soft, moonlike glow without introducing distracting reflected highlights. For jewelers and designers, recommended mounting approaches include secure bezel settings that protect the girdle and edge while allowing top light to activate the sheen, and low prong or channel mounts when additional metal exposure is acceptable. The absence of heat, dye, or coating treatments ensures long term stability of the color and optical effect, and The Natural Gemstone Company guarantees the stated measurements, weight, and visual grading. Please contact us for additional photographic angles under varied lighting, or for technical consultation regarding custom mounting and grading documentation.