Dark Opal 11.91 ct
This Australian Dark Opal weighs 11.91 carats. The stone measures approximately 2.2 cm in length, 1.6 cm in width, and 5 millimeters in depth.
The opal has been cut into an oval cabochon shape and polished on both sides.
This opal displays multicolor play-of-color, including shades of red, orange, yellow, green, and blue.
It is an untreated solid opal, not a doublet or triplet, originating from Lightning Ridge.
In terms of nomenclature, there is some variation. On the Australian scale for opal brightness, this opal is rated N6. Black opals fall between N1 and N4, while “Dark Opal,” sometimes referred to in Europe as "Semi-black Opal," ranges from N5 to N6. From N7 onwards, Australians refer to them as "Light Opal" or "White Opal." The term “Semi-black Opal” is less commonly used in Australia.
With its dimensions, this opal is well-suited as a centerpiece for a pendant.
