6.81 Ct. Cabochon Moonstone from Ceylon (Sri Lanka)

This translucent blue flash moonstone from The Natural Gemstone Company is a finely proportioned oval weighing 6.81 carats, with dimensions of 17.80 by 10.44 by 5.26 millimeters, cut en cabochon to maximize adularescence. The light color intensity and excellent polish allow a cool blue sheen to glide across the surface when viewed at different angles, a signature characteristic of high quality moonstone. Clarity is graded as very slightly included evaluated at eye level, which means any internal features are minimal and do not materially affect the visual allure or structural integrity of the gem. This example is unenhanced and originates from Ceylon, Sri Lanka, a well regarded source for moonstones that exhibit clean translucency and attractive blue flash. For an educated buyer, the combination of size, natural origin, lack of treatment, and skilled cabochon cutting translates into measurable value, particularly when selecting a centerpiece gem for custom jewelry.

From a gemological perspective this moonstone is an orthoclase feldspar displaying adularescence caused by light scattering from its internal lamellar structure, and the precise dome of the cabochon emphasizes that optical effect. The excellent polish reduces surface diffusion of light and preserves crispness of the blue flash, while the light body color provides an elegant, ethereal backdrop that suits both contemporary and classic settings. Given the 6.81 carat weight and the oval format, the stone is well suited to become the central element of a ring or pendant, though its Mohs hardness requires consideration in design to protect the stone from abrasion. The provenance from Ceylon, Sri Lanka increases its appeal to collectors who value traceable origins, and the absence of enhancements is an important factor for connoisseurs who prefer natural, untreated material.

For a custom piece, pairing this moonstone with complementary gemstones can elevate the visual narrative while respecting its soft blue luminosity. Small high quality white melee diamonds set in a halo will provide scintillation and a luminous frame that accentuates the blue flash, while tapered blue sapphires can echo the adularescence and deepen the cool palette for a refined, tonal composition. For contrast, warm metal choices such as rose gold will introduce a subtle, modern counterpoint, and for protection a bezel or partial bezel setting is advisable over exposed prongs. For a pendant, adding two pear shaped aquamarines on either side will create an elegant triptych that maintains translucency and harmony. These design approaches will highlight the intrinsic qualities of the moonstone, and The Natural Gemstone Company can work with you to source matching melee and accent stones and to specify settings that balance protection with maximum optical performance.