Natural Moonstone · 4.315 ct · Oval Cabochon · Tricolor Adularescence

This natural Moonstone weighs 4.315 carats and has been fashioned into a polished oval cabochon, with both sides finished to reveal the gemstone’s internal structure and changing optical character.

Measuring approximately 13.2 × 9.1 × 4.4 mm, the stone displays a milky white to locally clearer body appearance accompanied by distinctive tricolour adularescence. Depending on the lighting and viewing angle, the internal sheen shifts between yellow, green and several shades of blue, producing a layered and highly individual play of colour beneath the surface.

The relatively broad oval cabochon provides a large viewing area for the optical effect. In the supplied photographs, the adularescence appears in concentrated zones rather than as a completely uniform surface sheen, creating changing areas of blue-green, pale yellow and cooler blue light as the stone is tilted.

Fine lamellar feldspar structures, natural internal veils, fissure-related features and locally surface-reaching characteristics are visible within the gemstone. These features influence the distribution of the adularescence and contribute to the stone’s individual appearance rather than detracting from its natural character.

Adularescence is the characteristic optical phenomenon associated with Moonstone and results from the interaction of light with extremely fine internal feldspar layers. Light is scattered and interferes within these microscopic structures, producing the characteristic floating sheen visible beneath the polished surface.

The gemstone has been polished on both sides, allowing its internal structure and changing colour effect to be observed from multiple orientations. The cabochon form is particularly well suited to Moonstone because it allows the optical phenomenon to remain the central visual feature rather than relying on conventional facet brilliance.

No indications of heating or other treatment have been recorded for this gemstone. It is presented in its naturally documented state and is the exact natural Moonstone shown in the product photographs.

With its 4.315 ct weight, generous oval proportions and attractive combination of yellow, green and blue adularescence, this Moonstone offers a distinctive expression of feldspar’s characteristic optical behaviour. Its natural internal structure and multicoloured moving sheen make it particularly suitable for gemstone collecting, bespoke jewellery or settings designed to showcase the adularescent effect.