Natural Opal · 1.71 ct · Oval · Cabochon · Floral Rainbow · Ethiopia

This individually documented natural Opal weighs 1.71 ct and is fashioned as an elegant oval cabochon, measuring approximately 10.5 × 7.5 × 4.6 mm. The gemstone displays a translucent white body colour animated by a lively multicoloured play-of-colour, with visible flashes of orange, green, yellow, violet and blue appearing as the stone is moved through different lighting and viewing angles.

Precious Opal is an amorphous hydrated silica material distinguished by its ability to display play-of-colour. This optical phenomenon is produced by the interaction of light with sufficiently ordered microscopic silica spheres within the Opal structure, separating visible light into different spectral colours. The resulting colour display can shift considerably with movement, making every viewing angle visually different.

In this specimen, the play-of-colour shows a floral to rainbow-like distribution across the white body, with individual areas producing contrasting flashes of orange, green, yellow, violet and blue. The pattern is not uniformly distributed, which contributes to the natural and individual character of the gemstone.

The translucent body allows light to penetrate the material while preserving the soft white base colour. This combination creates depth beneath the polished cabochon surface and allows the spectral flashes to appear suspended within the stone rather than simply reflected from its exterior.

The oval cabochon cut is particularly well suited to precious Opal because its smooth curved surface allows the internal play-of-colour to remain the principal visual feature. The polished dome produces a vitreous to resinous surface luster while allowing the changing spectral colours to be observed from a broad range of viewing angles.

The recorded origin of this specimen is Ethiopia, an important modern source of precious Opal known for producing material with varied body colours and dynamic play-of-colour.

This gemstone is unheated and untreated, preserving its natural body colour, internal structure and optical characteristics.

With its 1.71 ct weight, translucent white body, lively floral rainbow play-of-colour and classic oval cabochon presentation, this natural Ethiopian Opal offers a distinctive combination of subtle body colour and continuously changing spectral flashes.