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Opals too thin to produce a "natural" opal may be combined with other materials to form "composite" gems. An opal doublet consists of a relatively thin layer of precious opal, backed by a layer of dark-colored material, most commonly ironstone, dark or black common opal (potch), onyx, or obsidian. The darker backing emphasizes the play of color ...
This list of mines in California is subsidiary to the list of mines article and lists working, defunct and future mines in the U.S. state of California. It is ...
This page was last edited on 22 January 2007, at 11:56 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
Meet the "Virgin Rainbow" – perhaps the finest and certainly the most expensive opal on record. It literally glows in the dark. In fact, as it gets darker around the opal, the opal appears ...
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The service originated as Fox 10 News Now, a webcast that had been run by KSAZ-TV in 2014. [2] It gained a large following on YouTube in 2016 when it carried former president Donald Trump's rallies and other live events uninterrupted and in their entirety. In 2020, the channel transitioned and rebranded to a national product called News Now ...
The good news for the milkvetch plant is that they usually need wildfire to sprout — meaning dormant seeds now have a massive new habitat for a new crop of the rare shrub.
Discovered last year, the comet C/2023 A3 Tsuchinshan-ATLAS will be visible in the California sky on Saturday night for the first time in 80,000 years.