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torendrikite

A monoclinic mineral, (Na,Mg,Fe)7Si4O11(OH,F) approx.; an amphibole intermediate between richterite and glaucophane; dark blue; at Itorendrika, Madagascar, and near Tine, Wadai, Africa.

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Looja

  • ed.young
  • (Milwaukee, United States)

  •  (V.I.P) 21084 points
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