Artist's reconstruction of Fostoria dhimbangunmal, a newly described iguanodontian dinosaur. James Kuether. Three decades ago, opal miner Bob Foster was getting frustrated while digging around in his ...

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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 ...

The world’s finest uncut opal, a 998-gram gem called the Fire of Australia, has gone on permanent public display for the first time since its discovery more than 60 years ago. Valued at more than $675 ...