单词	cassiterite
释义	cassiterite noun cas·​sit·​er·​ite kə-ˈsi-tə-ˌrīt  : a brown or black mineral that consists of tin dioxide and is the chief source of metallic tin called also tinstone Example Sentences Recent Examples on the Web Rwanda’s current-account deficit widened last year as shipment earnings from minerals such as cassiterite, which make up 14 percent of total exports, dropped 27 percent because of lower global commodities prices. Saul Butera, Bloomberg.com, 10 May 2017 Congo is rich in natural resources, including diamonds, gold, oil, timber, copper, hydropower, cassiterite for tin ore, uranium for nuclear bombs and cobalt for cellphones. Jeffrey Gettleman, New York Times, 3 Jan. 2017 Word History Etymology French cassitérite, from Greek kassiteros tin First Known Use 1858, in the meaning defined above
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