Black Opal Gemstone

Black Opal Gemstone
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​Black opal is appeared to be translucent to opaque, with play-of-color against a black or dark background. It’s considered to be the rarest, whereas white, gray, and green are the most common. It has been reported that Northern African opal was used to make tools as early as 4000 BC. The first discovery of opal was from Ethiopia in 1994, precious opal appeared in the Menz Gishe District, North Shewa Province. Just like the white opal, the black opal is found at the contact zone between the volcanic rock series and the underlying clay-rich layer. They often in demand because the color contrast is much greater against the dark background.