12.97 Ct. Cabochon Moonstone from Ceylon (Sri Lanka)

This exceptional translucent white moonstone weighs 12.97 carat and measures 18.56 by 12.33 by 8.49 millimeters, presented in a classic oval cabochon. The cabochon cut is executed with technical precision, featuring a well centered dome and symmetrical outline that optimizes adularescence. The lapidary oriented the crystal to align the feldspar layering with the dome axis, producing a clean, directional sheen across the surface rather than a scattered flash. Clarity is graded eye clean at standard viewing distance, which means the material contains no internal features visible to the unaided eye, preserving the smooth, uninterrupted play of light. Color intensity is near colorless, allowing the adularescent glow to read as a true white to blue white, and the excellent polish enhances surface smoothness, producing crisp light return and a tactile silkiness that signals top tier finishing. No enhancement has been applied to this stone, so the optical effects and body tone represent the natural character of the gem, with provenance traced to Ceylon Sri Lanka, a source renowned for high quality moonstones with strong, clean adularescence.

For a discerning gift this moonstone offers a combination of technical refinement and emotional resonance, its substantial 12.97 carat mass and generous dimensions providing physical presence on the hand or at the throat. The oval cabochon silhouette suits bezel and halo settings alike, and because the cutter prioritized dome height and orientation, the flash will remain striking under varied lighting conditions, from candlelight to daylight. Practical considerations for the recipient include a mindful setting choice to protect the stone, given moonstone hardness, and a preference for settings that allow light to travel across the dome to unlock the full adularescent display. At The Natural Gemstone Company we stand behind the original, untreated nature of this gem, and we can advise on ideal mounting approaches that preserve the stone and maximize its visual impact. Presented as a gift this moonstone communicates thoughtful selection and technical excellence, a memorable choice for someone who appreciates both the science of gem cutting and the quiet drama of a finely made gemstone.