Opals, as hydrated forms of silica, encompass a wide range of materials formed by both biogenic and diagenetic processes. The genesis of opal involves precipitation from silica‐rich fluids and ...
The beautiful optical properties of the gemstone opal are the result of tiny amounts of uranium present when the stones were formed, say researchers in Australia. They claim that their work could lead ...
Scientists have discovered a completely new type of opal formed by a common seaweed which harnesses natural technology by self-assembling a nanostructure of oil droplets to control how light reflects ...
Scientists have found opal-like crystals in the Tagish Lake meteorite, which fell to Earth in Canada in 2000. This is the first extraterrestrial discovery of these unusual crystals, which may have ...
The red dirt in central Australia might be a close mimic for the red surface of Mars, suggests research that sheds light on how opals formed in the land Down Under. Precious opal is Australia’s ...
In a find unlike anything seen before, a piece of opal from the island of Java in Indonesia holds some remarkable cargo: a stunningly preserved insect that may be at least four to seven million years ...
Scientists have discovered a completely new type of opal formed by a common seaweed which harnesses natural technology by self-assembling a nanostructure of oil droplets to control how light reflects ...
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