5.20 Ct. Blue Flash Cabochon Moonstone from Ceylon (Sri Lanka)

This 5.20 carat oval blue flash moonstone presents a precisely executed cabochon cut, with dimensions 11.51 by 8.85 by 7.21 mm and a substantial dome profile that optimizes adularescence. The body color is classified as light in intensity, while the dominant optical phenomenon is a clean, saturated blue flash that appears across the surface when oriented to light. Clarity is graded as very very slightly included as evaluated at eye level, reflecting only minimal internal characteristics that do not interfere with the visual field or the interplay of light. The table and girdle symmetry are carefully balanced to preserve an even, centered flash, and the excellent polish delivers a smooth, mirror like finish that enhances both luster and tactile quality. No enhancement has been applied, and the material is sourced from Ceylon Sri Lanka, a provenance known for fine adularescent specimens. Opal type is noted as White Opal, indicating an opalescent white body with pronounced blue adularescent flash, and the piece exhibits the classic soft translucency associated with top grade white opal type moonstones.

From a lapidary perspective the stone demonstrates disciplined cutting techniques, beginning with precise preforming to orient cleavage and growth directions, followed by progressive grinding to establish the oval outline and a high dome to maximize light return. Final polishing was executed with fine abrasives to achieve a uniform mirror polish without overworking the surface, preserving the integrity of the blue adularescence. The combination of a substantial dome height and excellent polish produces a bold, clear flash that reads as rich and authoritative despite the underlying light body color. This rich blue flash functions as a symbol of personal power and distinction, offering a visual language of confidence for settings that demand presence rather than ostentation. At The Natural Gemstone Company we present this stone as an ideal focal element for bespoke signet style rings or elegant pendant designs that require a pronounced central phenomenon, and for connoisseurs seeking a technically refined example of white opal type moonstone with uncompromised finish and natural provenance.