Following is a transcript of the video. Narrator: High-quality black opal can cost over $10,000 per carat, making it one of the world's most expensive gemstones. But mining black opal isn't easy.

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 ...

A research team using new methods to analyze data from NASA's Curiosity, a rover operating on Mars since 2012, was able to independently verify that fractures in the bedrock contained opal, on Earth a ...