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  2. Confidence Reef - Wikipedia

    en.wikipedia.org/wiki/Confidence_Reef

    The Struben brothers were engaged in active mining operations at Confidence Reef until 1888, extracting gold from a quartz vein that they had discovered. Following their departure, the site retained its importance within South Africa's mining history.

  3. Ajoite - Wikipedia

    en.wikipedia.org/wiki/Ajoite

    Ajoite in quartz from Messina District, South Africa (size: 16.9 x 3.7 x 3 cm.) Ajoite is named after its type locality , the New Cornelia Mine in the Ajo District of Pima County , Arizona . Type material is conserved at the National Museum of Natural History , Washington DC, US, reference number 113220.

  4. Glass in sub-Saharan Africa - Wikipedia

    en.wikipedia.org/wiki/Glass_in_sub-Saharan_Africa

    "Powder-Glass Beads in Africa". Ornaments from the past, bead studies after Beck: a book on glass and semiprecious stone beads in history and archaeology for archaeologists, jewellery historians and collectors. Bead Study Trust. pp. 108– 114. ISBN 9789749116593. OCLC 52696051. S2CID 190916548. Davison, Claire C. (September 1972).

  5. Powder glass beads - Wikipedia

    en.wikipedia.org/wiki/Powder_glass_beads

    Krobo powder glass beads, bicones. Powder glass beads are a type of necklace ornamentation. The earliest such beads were discovered during archaeological excavations at Mapungubwe in South Africa, and dated to between 970 and 1000 CE. Manufacturing of the powder glass beads is now concentrated in West Africa, particularly in the Ghana area.

  6. Riebeckite - Wikipedia

    en.wikipedia.org/wiki/Riebeckite

    Often referred to as blue asbestos, it is considered the most hazardous. The association between blue asbestos and mesothelioma was established by J. C. Wagner, C. A. Sleggs, and P. Marchand by 1960. [7] Crocidolite asbestos was mined in South Africa, Bolivia, and Wittenoom, Western Australia.

  7. Mapungubwe Collection - Wikipedia

    en.wikipedia.org/wiki/Mapungubwe_Collection

    Over decades, these excavations and scientific findings were largely held within academia and rarely reached public knowledge. The collection was assembled over 80 years of excavations by the University of Pretoria, although minor collections of Mapungubwe material are housed at several other institutions throughout South Africa.

  8. Bead - Wikipedia

    en.wikipedia.org/wiki/Bead

    A selection of glass beads Merovingian bead Trade beads, 18th century Trade beads, 18th century. A bead is a small, decorative object that is formed in a variety of shapes and sizes of a material such as stone, bone, shell, glass, plastic, wood, or pearl and with a small hole for threading or stringing. Beads range in size from under 1 ...

  9. Heliotrope (mineral) - Wikipedia

    en.wikipedia.org/wiki/Heliotrope_(mineral)

    A rough specimen of bloodstone. Heliotropes (from Ancient Greek ἥλιος (hḗlios) ' sun ' and τρέπειν (trépein) ' to turn ') (also called ematille, Indian bloodstones, or simply bloodstones) are aggregate minerals, and cryptocrystalline mixture of quartz that occurs mostly as jasper or sometimes as chalcedony (translucent).

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