Natural Moonstone · 3.935 ct · Pear Cabochon · Blue Adularescence

This natural Moonstone weighs 3.935 carats and has been fashioned into a polished pear-shaped cabochon, with both sides finished to reveal the gemstone’s internal structure and changing optical character.

Measuring approximately 11.7 × 9.3 × 4.7 mm, the stone displays a milky white to locally clearer body appearance accompanied by attractive light blue, greenish blue and stronger blue adularescence. As the gemstone is tilted beneath the light, these colours shift across the cabochon and create the characteristic floating inner glow associated with Moonstone.

The pear-shaped form provides a generous face-up viewing area for the phenomenon. In the supplied photographs, the adularescence extends across substantial areas of the stone, ranging from cooler pale blue zones to brighter cyan-blue and locally greenish-blue flashes. The intensity and position of the effect naturally change with viewing angle and illumination.

Natural internal feldspar structures remain clearly visible beneath the polished surface, including lamellar growth features, cloudy zones, internal veils and fissure-related characteristics. These features influence the distribution of the adularescence and contribute to the individual appearance of this particular gemstone.

Adularescence results from the interaction of light with extremely fine internal feldspar layers. Light scattering and interference within these microscopic structures produce the characteristic moving sheen that appears beneath the surface rather than as conventional surface reflection or facet brilliance.

The cabochon has been polished on both sides, allowing its internal structure and optical effect to be appreciated from multiple orientations. This cutting style is particularly well suited to Moonstone because the smooth domed surface helps reveal the movement and changing intensity of the adularescence.

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 3.935 ct weight, balanced pear outline and attractive combination of light blue, greenish blue and vivid blue adularescence, this Moonstone offers a distinctive expression of feldspar’s characteristic optical behaviour. Its natural internal structure and shifting colour effect make it particularly suitable for gemstone collecting, bespoke jewellery or a setting designed to showcase the adularescent phenomenon.