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

This 1.82 carat translucent oval blue flash moonstone presents itself with elegant proportions, measuring 11.54 x 6.85 x 2.89 mm, and exhibits the classical cabochon cutting style that best showcases its optical phenomenon. Cut as a smooth cabochon with an excellent polish, this gem displays a soft, floating glow that appears to move across or beneath the surface when rotated under light. That effect, known as adularescence, is produced by the fine lamellar intergrowth of orthoclase and albite within the feldspar structure, scattering and diffracting light into a luminous blue sheen. The body color is classified as light intensity, allowing the adularescence to read clearly against a delicate translucent background, while the clarity grade is noted as very very slightly included, evaluated at eye level, which means the stone remains visually clean and lively to the unaided eye. No enhancements have been applied, and the origin is Ceylon, Sri Lanka, a source long celebrated for producing moonstones with exceptional adularescence and stable material.

From a gemological perspective this moonstone offers a compelling combination of attributes that matter to an educated collector. The cabochon cut is deliberately chosen to maximize the movement of light across the dome, creating a curtain of bluish flash that seems to swim under the surface rather than sitting on top of it. Translucency and light body color make this effect especially legible, while the very very slightly included clarity means that internal features do not interrupt the adularescent plane, preserving the gem’s ethereal appearance. Technically this gemstone is a variety of feldspar, not an opal, however the soft adularescence can be evocative of White Opal, Opal type, White Opal. The absence of treatments or enhancements increases its rarity and market value, because untreated moonstones with bright blue adularescence and excellent polish are sought after by collectors and designers who value natural character and long term stability.

At The Natural Gemstone Company we prioritize ethical sourcing and traceability, and this moonstone is procured from responsible supply chains in Ceylon, Sri Lanka, where local artisanal miners and small scale operations are engaged under fair practice agreements. We can provide provenance details and sourcing narratives on request, and we work with partners who adhere to environmental safeguards and community support initiatives, practices that appeal to conscious consumers who want beauty with integrity. For the wearer this piece adapts beautifully to elegant bezel settings, minimalist prongs, or as a distinctive center stone in a signet style, and because it is untreated and stable it is suitable for thoughtful daily wear with the usual care guidelines. We recommend avoiding prolonged exposure to harsh chemicals and extreme heat, and to clean gently with warm soapy water and a soft brush. As stewards of fine natural material, The Natural Gemstone Company will provide certification and additional imagery to assist in appraisal and design decisions, making this 1.82 carat blue flash moonstone an ethically sourced, scientifically described, and sensibly priced addition to a conscious collector’s cabinet.