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 Address to refer: http://www.miningweekly.com/article/tanzanite-colours-perception-of-gem-rankings-2008-01-18
 Article Headline: Tanzanite colours perception of gem rankings
 Abstract: It has been 40 years since the first discovery of the tanzanite gemstone in Merelani, Tanzania, by a Masaai tribesman in a mountainous region 40-km south of Mount Kilimanjaro, but the precious mineral is, in the last few years, becoming more sought after than it has ever been, says tanzanite mining and marketing company TanzaniteOne CEO Ian Harebottle.
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