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A few types of quartz that are not colorless and natural are: Latte Quartz, Champagne Quartz. Colorless quartz is always untreated. Colored stones can occasionally be enhanced in color by dying (a combination of bathing in color agent solutions, fallowed by heating), irradiation (bombardment with low level radioactivity), or heating.
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According to published incomplete data (not including the USA and 10 other countries), among 19 of the 30 OECD member states (OECD, 1997, 1999), Canada held the dominant position in the amount ofmining wastegenerated annually (~65.4% of the total); 23 member states of OECD –Europeproduced 402.4 Mt, which was about 25%, while 15 EU member states generated 19.0% of the total OECD ...
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Andesite: The specimen shown is about two inches (five centimeters) across and has a porphyritic texture. Igneousrockcomposition chart: This chart shows that andesite is typically composed of plagioclase, amphiboles, and micas; sometimes with minor amounts of pyroxenes, quartz, or orthoclase.
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