The gemstone deposits of Brazil: occurrences, production and

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Above: Front of the Specimen Card Formed in volcanic rocks and colored violet by radiation, amethyst has an explosive origin. The traditional

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PDF] The gemstone deposits of Brazil: occurrences, production and economic impact

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SciELO - Brasil - Aquamarine from Massangana batholith, Rondônia State: mineral chemistry and fluid inclusion data Aquamarine from Massangana batholith, Rondônia State: mineral chemistry and fluid inclusion data

The gemstone deposits of Brazil: occurrences, production and economic impact

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