Southern Arizona has numerous sites known for their pyroxene minerals, from Twin Buttes south of Tucson, to Ajo, to the Chiricahua, Santa Rita and Patagonia mountain ranges.

As the molten material rose to shallower levels (less than 4 kbar), it cooled more slowly, allowing iron-rich pyroxene rims and plagioclase to form. The resulting coarse-grained texture preserves a ...

At first glance, it might seem like an ordinary hunk of stone, but this particular rock just got snapped up for a mere AU$8.2 million.

The largest piece of Mars ever found on Earth was sold for just over $5 million at an auction of rare geological and ...

The largest piece of Mars ever found on Earth was sold for just over $5 million at an auction of rare geological and archaeological objects in New York on Wednesday.

It has a course-grained texture and contains the minerals pyroxene and olivine, Sotheby’s says. It also has a glassy surface, likely due to the high heat that burned it when it fell through Earth’s ...

These methods revealed decoupled geochemical behaviors in pyroxene cores and rims—a phenomenon critical for reconstructing magma chamber dynamics.

Both meteorites contain olivine and pyroxene, minor albitic plagioclase and oldhamite. Such features are consistent with predictions for Mercury's surface composition.

NASA's Perseverance rover found a skull-shaped rock on Mars in Jezero Crater. Scientists call it Skull Hill. It is likely a 'float rock' moved by natural forces. Analysis suggests it is an igneous ...

NASA's Perseverance rover on Mars has discovered unusual "float" rocks on the rim of Jezero Crater while searching for signs of ancient microbial life. Scientists are investigating their origin.

Using NASA's Perseverance rover to analyze Martian rocks, researchers suggest that Mars' complex volcanism might hold clues about the planet's ancient habitability.