"The key for identification of rock-forming minerals provides an efficient and systematic approach to identifying minerals in thin-section. It is structured in the form of a dichotomous key, ...

Test your rock & mineral smarts—are you a Rock Star? Think you know rocks and minerals? Take the Science Trek quiz! Test your smarts on gold, salt, Earth’s oldest rocks, gemstones on Mars, and the ...

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. Pyroxenes are classified ...

Volumes 2B, 3B published by The Geological Society; London, 1997. Volume 5A published by The Geological Society; London, 2011. v. 1A. Orthosilicates -- v. 1B. Disilicates and ring silicates -- v. 2A.

Wadi Lawayni is a remote desert valley in the interior Al-Hajar Mountains of Oman, east of Saudi Arabia. A visitor gets there by following a lonely dirt road that dwindles to tire tracks running ...