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identify silver ore rock powder

University of Minnesota's Mineral Pages: Dolomite It also will not react with dilute acid as dolomite powder ... remain as calcite fossils in an otherwise dolomite rock. ... with metallic ore minerals ... Rocks & Minerals Definitions Rocks & Minerals O-Z. Obsidian Obsidian is volcanic glass. Oligoclase Oligoclase has the formulae ... It is an ore of silver. Has a characteristic ruby-red colour, vermilion streak and a brilliant luster. ... Streak refers to the color of the powder produced when a mineral is rubbed over the surface of a piece of unglazed, white porcelain. Taconite Total ore shipped: About 1 billion tons Total rock ... The rock is mixed with water and ground in rotating mills until it is as fine as powder. 4. Separation The iron ...    Read More

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