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Signet Jewelers Ltd. (Ratner Group 1949–1993 then Signet Group plc to September 2008) is, as of 2015, the world's largest retailer of diamond jewellery. [1] The company is domiciled in Bermuda and headquartered in Akron, Ohio, and is listed on the New York Stock Exchange.
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]
Andalusite, kyanite, and sillimanite are the principal aluminium silicate minerals. [2] [3] [4] The triple point of the three polymorphs is located at a temperature of 500 °C (932 °F) and a pressure of 0.4 GPa (58,000 psi). These three minerals are commonly used as index minerals in metamorphic rocks.
Workers made jewelry by hand at various factories in the area. The Providence Jewelry Manufacturing Historic District is a predominantly industrial historic district in Providence, Rhode Island. It covers a roughly 19-acre (7.7 ha) area in the city's Jewelry District, just south of Downtown Providence. While the area began as a residential ...
Shane Company or Shane Co. is the largest privately owned jeweler in the United States. [1] The company is a direct diamond, ruby, and sapphire importer that operates 20 retail stores across the US, as well as their website, ShaneCo.com.
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.
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