2.27 Ct. White Cabochon Moonstone from Ceylon (Sri Lanka)

This oval white moonstone weighs 2.27 carats, with precise dimensions of 9.05 x 7.00 x 5.07 mm, and is offered by The Natural Gemstone Company. The gem is cut as a high dome cabochon, a classic style for moonstone that optimizes the stone s intrinsic adularescence. Color intensity is described as near colorless, producing a clean, translucent body that allows the internal light play to read with clarity. Clarity has been evaluated at eye level as very very slightly included, indicating only minor, well dispersed growth features that do not distract from the visual effect when the stone is set. The polish is excellent, providing a smooth, mirror like surface that enhances both luster and the uninterrupted flow of the adularescent band. There has been no enhancement, and the material is natural Sri Lankan moonstone, sourced from Ceylon, a provenance known for producing stones with pure body color and fine adularescence.

The cabochon cutting and finishing are the primary determinants of optical performance in this specimen. The oval outline measures just over nine by seven millimeters, while the five millimeter plus height indicates a relatively high dome, an intentional proportion that strengthens the single, centralized band of light that traverses the dome. In cabochon work, the cutter orients the platy feldspar intergrowths perpendicular to the table so that light entering the dome scatters across the lamellar interfaces, producing the moving sheen we refer to as adularescence. The symmetry of the oval, evenness of the dome curvature, and a clean girdle profile are all evident, demonstrating disciplined preforming and consistent material removal during shaping. Excellent polish is essential for moonstone, because any micro abrasion will diffuse and weaken the sheen, therefore the mirror finish on this gem ensures maximum contrast between the translucent body and the bluish white light band.

From a mineralogical and optical perspective this moonstone is a member of the feldspar group, consisting of an intergrowth of sodium and potassium rich feldspars. The adularescence arises from light scattering at microscopic lamellar or exsolution layers, an interference effect rather than a pigment based color. In a near colorless body, the adularescent band appears as a cool white to faint blue plane of light that moves smoothly across the dome as viewing angle changes. The very very slightly included clarity grade indicates that inclusions are primarily internal growth structures and tiny platelets, which under magnification may appear as delicate veils, however these do not form opaque areas and therefore preserve the stone s translucency. The interplay between body translucency, dome curvature, and lamellar orientation produces a clean, well defined band, which in this example is centered and has a strong contrast against the surrounding stone, a sign of careful orientation and material selection by the cutter.

In terms of durability, moonstone registers between six and six point five on the Mohs hardness scale, a medium hardness that requires consideration when designing wearable pieces. For context, diamond is ten, corundum species such as sapphire and ruby are nine, topaz is eight, quartz is seven, and common glass is approximately five point five. The practical implication is that a moonstone will resist everyday abrasion better than softer materials like opal or turquoise, yet it is more susceptible to scratching and mechanical shock than corundum and harder gems. For longevity we recommend protective mounting styles such as bezel settings or low profile bezels that shield the girdle and reduce exposure to lateral impact. Avoid ultrasonic cleaners and steam cleaning, and do not expose the stone to harsh household chemicals, acids, or prolonged heat, as these conditions can compromise polish and may exacerbate internal stress. Routine care should include gentle cleaning with warm soapy water and a soft brush, and periodic inspection of the setting to ensure security. With its Ceylon origin, natural state, and meticulous cabochon cutting, this 2.27 carat oval moonstone represents a technically refined choice for collectors and designers, and The Natural Gemstone Company is available to advise on suitable mounting approaches, bespoke settings, and secure shipping to preserve the integrity and visual performance of this elegant stone.