0.63 Ct. Moonstone from Ceylon (Sri Lanka)

This listing describes a single transparent white moonstone, weighing 0.63 carat, presented in a classic emerald cut. The gem measures 7.48 millimeters by 4.39 millimeters by 2.92 millimeters, and it displays a near colorless color intensity. Clarity is graded as very slightly included, evaluated at eye level, and the piece benefits from an excellent polish. There is no enhancement, and the stone is natural in origin, sourced from Ceylon Sri Lanka. The emerald cut provides broad step facets and clean geometry, which highlights the stone transparency and internal features in a measured and controlled way. The combination of weight, dimensions, and cut yields a balanced pavilion and crown profile that is suitable for precision settings, and the very slightly included clarity at eye level indicates the stone will read as clean in typical jewelry applications.

Light interaction is a defining characteristic of this moonstone, and the cut and polish have been selected to optimize its optical behavior. Under bright daylight, the stone exhibits a clear, cool adularescence, a soft silvery to slightly bluish sheen that moves across the step facets as the angle of view changes. Direct natural sunlight emphasizes the transparency and faceted sparkle, while the adularescent flash remains visible as a layered, floating sheen over the table. In warm incandescent light the tone becomes softer, with the silvery sheen taking on a warmer, creamier appearance, and internal reflections become gentler. Under modern LED lighting, the stone presents crisp facet outlines and a balanced contrast between the step reflections and the adularescent glow, making the emerald cut geometry readily apparent. In low or candlelit conditions the moonstone reveals a more subtle and diffuse glow, with the sheen appearing to emanate from within, creating an intimate and silky visual effect. For settings, a bezel or partial bezel will accentuate the stone profile and preserve the internal sheen, while a prong setting will maximize light exposure to enhance both the transparency and the moving adularescence. At The Natural Gemstone Company we document these characteristics to support informed selection and to ensure the gem performs predictably across lighting environments.