Tags Opal

Tag: Opal

World’s finest piece of opal Worth $900,000

The finest uncut opal in existence, the Fire of Australia, has joined the South Australian Museum’s collection through the vision of a private donor...

Opal discovered in Antarctic meteorite

Planetary scientists have discovered pieces of opal in a meteorite found in Antarctica, a result that demonstrates that meteorites delivered water ice to asteroids...

Types of Opal

Opal is a hydrated amorphous form of silica; its water content may range from 3 to 21% by weight, but is usually between 6...

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