4.69 Ct. Cabochon Moonstone from Ceylon (Sri Lanka)

One beautiful opaque 4.69 carat cushion shape blue flash moonstone is presented here with classic dimensions of 9.80 x 9.63 x 6.86 mm, a domed cabochon cut that maximizes the gem's signature adularescence, a clarity grade of very slightly included as evaluated at eye level, a medium light color intensity, and an excellent polish. This stone is completely natural, with no enhancement, and has its origin recorded as Ceylon Sri Lanka. The cushion outline offers a softly rounded square silhouette that sits comfortably in a wide variety of jewelry styles, while the cabochon dome provides the perfect canvas for the internal sheen to glide across the surface as the gem moves. Photographed against a dark background, the moonstone shows a subtle, cool blue flash that shifts when tilted, a trait prized by collectors and designers alike. The Natural Gemstone Company is pleased to offer this single, distinctive specimen for those seeking a high quality example of classic Sri Lankan moonstone.

The optical charm of this moonstone is best understood through its adularescence, the shimmering play of light caused by thin, alternating layers within the stone that scatter light into a bluish sheen. Even though this gem reads as opaque, the cabochon shaping and expert polish allow the blue flash to emerge strongly, giving a luminous effect that appears to float below the surface. Viewing this stone under soft, diffuse daylight or a cool LED will bring out the most dramatic blue cloud, while warmer incandescent light tones will reveal more of the creamy body color and subtle internal textures. Because the cut concentrates the sheen toward the center, a center bezel or open gallery setting will showcase the flash beautifully. Designers often pair such moonstones with lustrous metals like white gold or platinum to emphasize the cool blue flash, or with warm yellow gold to create an appealing contrast.

From a clarity and care perspective, the very slightly included grade evaluated at eye level indicates minor internal characteristics that are typical for natural moonstone and do not detract from its overall appearance when mounted. The excellent polish enhances surface smoothness and helps the adularescence glide uninterrupted across the dome. This is an untreated gem, free from dye or heating, a point that collectors appreciate for both aesthetic and resale considerations. Moonstone registers around 6 to 6.5 on the Mohs hardness scale, so while it is perfectly suitable for pendants and earrings, care should be taken for rings that are exposed to daily abrasion. Cleaning with warm soapy water and a soft brush or cloth is recommended, while ultrasonic cleaners and harsh chemical agents should be avoided. For settings, consider protective bezels or slightly raised prongs to guard the dome and retain light entry for optimum flash.

As a trusted source for responsibly sourced natural gems, The Natural Gemstone Company stands behind this blue flash moonstone with clear provenance and accurate grading. Its Ceylon origin, combined with the attractive cushion cabochon form and strong polish make it an excellent choice for bespoke jewelry, an heirloom piece, or a refined addition to a gemstone collection. If you would like assistance with custom mounting suggestions, matching stones for a pair or set, or additional high resolution images to examine the adularescence under different lighting, we are happy to help. Our team can advise on secure shipping, custom setting partners, and authentication documentation to ensure your purchase meets both aesthetic and investment expectations. Contact The Natural Gemstone Company to discuss this 4.69 carat cushion blue flash moonstone and let us help you transform it into a wearable treasure.