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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 .
The sky-blue crystals are kyanite. Minor white quartz is present, presumably from the recrystallization of coesite. A few gold-white phengite patches can be seen at the top. A 23 millimetres (0.91 in) coin added for scale.
Kainite (/ ˈ k aɪ n aɪ t / or / ˈ k eɪ n aɪ t /) [4] (KMg(SO 4)Cl·3H 2 O) is an evaporite mineral in the class of "Sulfates (selenates, etc.) with additional anions, with H 2 O" according to the Nickel–Strunz classification.
Willis Mountain is a monadnock rising from the rolling Piedmont hills of Buckingham County, Virginia, near the geographic center of the state. It is composed of Kyanite-bearing quartz that weathers more slowly than the surrounding material. [1]
Polymorphism can extend beyond pure symmetry content. The aluminosilicates are a group of three minerals – kyanite, andalusite, and sillimanite – which share the chemical formula Al 2 SiO 5. Kyanite is triclinic, while andalusite and sillimanite are both orthorhombic and belong to the dipyramidal point group.
Henry's Knob name derives from the Henry family, early settlers of York County who originally owned the mountain and surrounding land. In 1765 William Henry was granted 336 acres (1.36 km 2) on the south side of the Little Mountain, as Henry's Knob was then called, and four years later he was granted another 100 acres (0.40 km 2).
The minerals kyanite and sillimanite are polymorphs of andalusite, each occurring under different temperature-pressure regimes and are therefore rarely found together in the same rock. Because of this the three minerals are a useful tool to help identify the pressure-temperature paths of the host rock in which they are found.
Nationwide Insurance will also pay the Blue Jackets $28 million to retain the arena's naming rights until 2022 as well as $58 million to purchase 30% ownership stake in the franchise. The Blue Jackets, in turn, agreed to remain in the city until 2039 or pay $36 million in damages. [5]