Amber has long been prized for not only its lush, fiery hues, but its elaborate contributions to Earth’s fossil record. As Vasika Udurawane writes for Earth Archives, the petrified tree resin starts ...
Few realize that the world’s most famous black fire opal – the official Nevada State Gem – was discovered in Nevada’s remote Virgin Valley in 1918. Col. W.A. Roebling, a civil engineer who helped ...
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