NASA’s Curiosity rover has discovered opal on Mars. The deposits may prove to be valuable to future Martian explorers not as jewelry but as a potential source of water. Opal is formed when water ...

A gem of a meteorite found in Antarctica is studded with pieces of opal, a crystal that is associated with water. The discovery lends greater strength to the idea that meteorites brought water to ...

Mars may have been wet for a billion years longer than previously thought, new water-related opal evidence from NASA's Mars Reconnaissance Orbiter suggests. The findings have implications for the ...

NASA’s Perseverance rover has uncovered high-purity quartz crystals on Mars, a discovery that could reshape the search for ...

Opal, a mineral that needs water to form, is widespread in Martian terrain younger than 2.5 billion years old, new spacecraft observations suggest. The discovery offers the most recent mineralogical ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Opals may have been around for thousands of years, but they’re having a major resurgence in the jewelry ...

Brian Bennett is a former senior writer for the home and outdoor section at CNET. Many nugget-style ice fanatics jumped at the chance to own a $549 Opal ice machine. Now they have another tempting ...

Nature continues to prove that it is the ultimate artist, crafting beauty that defies imagination. A recent discovery in ...