Natural Moonstone · 9.278 ct · Cushion · Custom Cut

This individually documented natural Moonstone weighs an impressive 9.278 carats and has been fashioned into a distinctive cushion-shaped custom cut. The gemstone displays a clear to slightly white body appearance with a very subtle blue adularescence, producing a delicate floating sheen that becomes visible under favourable lighting and changing viewing angles.

Measuring approximately 11.8 × 12.4 × 10.0 mm, this substantial specimen has strong visual presence and considerable depth. The custom facet arrangement gives the stone an individual optical character while allowing its natural transparency and internal feldspar structure to remain clearly visible.

The gemstone is transparent and has a clarity profile comparable to SI1. Natural internal inclusions and fine structural features may be visible, particularly under magnification, but the material retains good transparency and a clean overall presentation for a faceted Moonstone of this size.

A defining characteristic of this specimen is its very slight blue adularescence. The effect appears as a restrained bluish sheen rather than a strong continuous flash, creating a subtle contrast against the clear to slightly white body colour.

Adularescence is associated with the internal layered structure of Moonstone. Light interacting with extremely fine feldspar lamellae produces the characteristic floating blue-to-white sheen that can appear to move beneath the surface as the gemstone is tilted. The visibility and intensity of this effect depend on the internal structure, orientation, cutting and viewing conditions.

This specimen is recorded with no indications of heating and no indications of other treatment, allowing its natural colour, internal character and optical behaviour to be presented as documented.

The overall cutting quality is assessed as Very Good, with Very Good symmetry supporting a balanced cushion outline. The gemstone also shows Good polish and Very Good luster, contributing to strong surface reflections and a refined visual presentation.

Faceted Moonstone requires material with sufficient transparency and structural quality to support a precision cut while retaining the optical character associated with feldspar. In this specimen, the substantial size, transparent body and restrained adularescence create a different visual expression from the more strongly adularescent cabochon-cut material commonly encountered.

As a natural gemstone, internal inclusions, fine lamellar growth structures, subtle internal variations and minor surface-reaching characteristics may occur. These features form part of the geological development and individual identity of the stone.

With its substantial 9.278 ct weight, transparent appearance, custom cushion faceting and delicate blue adularescence, this natural Moonstone offers a distinctive combination of size, precision cutting and subtle feldspar optics. It is particularly suited to gemstone collectors, bespoke jewellery or designs where the natural transparency and individual cutting style can remain central to the presentation.