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Kyanite is a typically blue aluminosilicate mineral, found in aluminium-rich metamorphic pegmatites and sedimentary rock. It is the high pressure polymorph of andalusite and sillimanite , and the presence of kyanite in metamorphic rocks generally indicates metamorphism deep in the Earth's crust .
Eclogite piece from Norway with a garnet (red) and omphacite (greyish-green) groundmass.The sky-blue crystals are kyanite.Minor white quartz is present, presumably from the recrystallization of coesite.
The stability fields of the Al 2 SiO 5 minerals polymorphs. 1, 2 and 3 are the stability fields of Kyanite, Andalusite and Sillimanite respectively. TP is the triple point, where, theoretically the three aluminosilicates minerals exist in equilibrium.
Jessica Simpson and husband Eric Johnson are taking time apart.. The singer and actress, 44, and her former NFL player husband, 45, are separating after 10 years of marriage, Simpson tells PEOPLE ...
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The huge collection of vintage and luxury cars is one of the museum's attractions. - Mustafa Abumunes/AFP/Getty Images. Siham Haleem, a private tour guide for 15 years, says that Doha now has many ...
At the very top of Billionaire Mountain, I stopped at The Peak House, a 22,000-square-foot estate that sold for $40 million in 2022. The Peak House is the highest residence on Red Mountain and ...