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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. Kyanite is also known as disthene or cyanite. [5]
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.
Lapis lazuli (UK: / ˌ l æ p ɪ s ˈ l æ z (j) ʊ l i, ˈ l æ ʒ ʊ-,-ˌ l i /; US: / ˈ l æ z (j) ə l i, ˈ l æ ʒ ə-,-ˌ l i /), or lapis for short, is a deep-blue metamorphic rock used as a semi-precious stone that has been prized since antiquity for its intense color.
In 2005 Rosy Blue became a founding and certified member of the Responsible Jewellery Council. [14] [15] In 2008 Rosy Blue became a signatory to the United Nations Global Compact. [16] In 2017, Rosy Blue was named in both Panama Papers and Paradise Papers as an entity which transferred money to safe havens to avoid taxes in the country. [17]
In 2015, Blue Nile reported net sales of US$473 million and net income of US$9.7 million. [1] Blue Nile promotes itself as a supplier of ethically sourced diamonds and endorses a zero-tolerance policy towards conflict diamonds. [9] In the summer of 2015, Blue Nile opened their first showroom at Roosevelt Field Mall on Long Island, New York.
Kyanite is an aluminum silicate mineral that is typically formed under high pressure during the metamorphism of clay-rich (pelitic or argillaceous) rocks. Kyanite is also found in kimberlites, which are unusual intrusive rocks that contain diamonds. My class is studing rocks and one of my favorite ones are the Kyanite is is very pretty and cool.
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