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Dioptase from the Congo May 21, 2019 · 4 specimens New Dioptase specimens from the Mindouli District of the Congo. These have a number of interesting features, including rounded dome or cup shaped formations either as part of the specimen or in 2 cases, comprising the entire specimen; wheat-sheaf like crystal growth; and associations with other minerals including Wulfenite and an unidentified globular green mineral. |
