Elongated oval stone (55.72 cts) with a flat opalized surface and a central Y shaped pattern delimiting three areas with a strong mainly red / crimson play of colors somewhat reminiscent of the palette of a painter. The color set is very different depending on the nature of incident light (fluorescent, incandescent or LED) and the angle of incidence, and the red flashes more or less marked.

Allah's Rush, Coocoran Opal fields, Lightning Ridge, Walgett Shire, New South Wales

1992

From the Sanskrit upala, meaning precious stone.

8 - Silicates / Tectosilicates

3x4x1

5.5

2

"101 Minéraux et Pierres Précieuses qu'il faut avoir vus dans sa vie", "Minéraux - Le Guide des Passionnés"