And why is it so expensive? Black opal is one of the most enchanting stones in the world, sought after for its seemingly infinite display of colors. Compared to common opal, which is usually one ...

Opal is known for its unique iridescence which makes it very popular amongst collectors and jewelers. This week, learn about common opal, precious opal and Nevada's state mineral, black fire opal!

New type of 'opal' formed by common seaweed Seaweed makes its own living opal nanotechnology Date: April 17, 2018 Source: University of Bristol Summary: Scientists have discovered a completely new ...

FELTON — An amateur miner hopes to sell what he believes is one of the largest common fire opals in America uncovered near his farm in Idaho. Jim Hartrim, a local gem jeweler, was tending his ...

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 ...