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Beautiful specimen Beautiful Ruby from Winza, Mpapwa, Mpapwa District, Dodoma region, Tanzania RUBY
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Bustamite: Bustamite is a calcium manganese inosilicate (chain silicate) and a member of the wollastonite group. Magnesium, zinc and iron are common impurities substituting for manganese. Bustamite could be confused with light-colored rhodonite or pyroxmangite, but both these minerals are biaxial (+) whereas bustamite is biaxial (-).