BORATES, CARBONATES, NITRATES

Minerals in the borate class feature boron-oxygen groups that can connect through polymerization, creating chains, sheets, and various isolated structures. Similar to how silicates' silicon-oxygen (SiO4) tetrahedrons link up, the borates' (BO3)3– triangular groups also form connections. A single oxygen atom acts as a bridge between two boron cations (B3+), allowing the BO3 groups to form larger structures like double triangles, triple rings, sheets, and chains. This is possible because the small boron cation has a bond strength with oxygen that is precisely half of the bond energy of the oxygen ion.

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  • Malachite with Quartz from Congo, vibrant green botryoidal clusters on white matrix, mineral specimen

    MALACHITE, Rum Jungle, Northern Territory Australia (miniature), wulfenite, cerussite

    MALACHITE, Rum Jungle, Northern Territory Australia (miniature), wulfenite, cerussite
    $19.00
  • Malachite with white calcite, mineral specimen from Congo, vibrant green and white crystal formation

    MALACHITE, Rum Jungle, Northern Territory Australia (miniature), wulfenite, cerussite

    MALACHITE, Rum Jungle, Northern Territory Australia (miniature), wulfenite, cerussite
    $19.00
  • Malachite mineral specimen with botryoidal texture, green copper carbonate crystal formation on matrix

    MALACHITE, Rum Jungle, Northern Territory Australia (miniature)

    MALACHITE, Rum Jungle, Northern Territory Australia (miniature)
    $29.00
  • Malachite with Quartz from Congo, vibrant green mineral specimen for collectors

    MALACHITE, Rum Jungle, Northern Territory Australia (miniature), calcite

    MALACHITE, Rum Jungle, Northern Territory Australia (miniature), calcite
    $17.00
  • Malachite specimen with vibrant green bands and matrix, mineral collector's piece

    MALACHITE, Rum Jungle, Northern Territory Australia (miniature), calcite

    MALACHITE, Rum Jungle, Northern Territory Australia (miniature), calcite
    $17.00
  • Malachite with Calcite crystals, vibrant green and white mineral specimen for collectors

    MALACHITE, Rum Jungle, Northern Territory Australia (miniature), cerussite

    MALACHITE, Rum Jungle, Northern Territory Australia (miniature), cerussite
    $17.00
  • Malachite mineral specimen with vibrant green botryoidal formations on matrix, classic locality specimen

    MALACHITE, Rum Jungle, Northern Territory Australia (miniature)

    MALACHITE, Rum Jungle, Northern Territory Australia (miniature)
    $12.00
  • Malachite mineral specimen with botryoidal formations, vibrant green crystal clusters on matrix

    MALACHITE, Rum Jungle, Northern Territory Australia (miniature), cerussite, wulfenite

    MALACHITE, Rum Jungle, Northern Territory Australia (miniature), cerussite, wulfenite
    $15.00
  • Malachite botryoidal specimen from Congo, vibrant green mineral cluster for collectors

    MALACHITE, Rum Jungle, Northern Territory Australia (miniature)

    MALACHITE, Rum Jungle, Northern Territory Australia (miniature)
    $20.00
  • Malachite on quartz matrix, vibrant green bands, mineral specimen for collectors

    MALACHITE, Rum Jungle, Northern Territory Australia (miniature)

    MALACHITE, Rum Jungle, Northern Territory Australia (miniature)
    $17.00
  • Malachite with quartz and chalcopyrite, vibrant green botryoidal formations on matrix

    MALACHITE, Rum Jungle, Northern Territory Australia (miniature)

    MALACHITE, Rum Jungle, Northern Territory Australia (miniature)
    $17.00
  • Malachite mineral specimen with botryoidal texture, vibrant green color, and earthy matrix

    MALACHITE, Rum Jungle, Northern Territory Australia (miniature)

    MALACHITE, Rum Jungle, Northern Territory Australia (miniature)
    $13.00
  • GLENDONITE, Calcite ps after ikaite, Henrietta, Tasmania, Australia

    GLENDONITE, Calcite ps after ikaite, Henrietta, Tasmania, Australia

    GLENDONITE, Calcite ps after ikaite, Henrietta, Tasmania, Australia
    $55.00
  • GLENDONITE, Calcite ps after ikaite, Henrietta, Tasmania, Australia

    GLENDONITE, Calcite ps after ikaite, Henrietta, Tasmania, Australia

    GLENDONITE, Calcite ps after ikaite, Henrietta, Tasmania, Australia
    $95.00
  • GLENDONITE, Calcite ps after ikaite, Henrietta, Tasmania, Australia

    GLENDONITE, Calcite ps after ikaite, Henrietta, Tasmania, Australia

    GLENDONITE, Calcite ps after ikaite, Henrietta, Tasmania, Australia
    $115.00
  • GLENDONITE, Calcite ps after ikaite, Henrietta, Tasmania, Australia

    GLENDONITE, Calcite ps after ikaite, Henrietta, Tasmania, Australia

    GLENDONITE, Calcite ps after ikaite, Henrietta, Tasmania, Australia
    $45.00
  • GLENDONITE, Calcite ps after ikaite, Henrietta, Tasmania, Australia

    GLENDONITE, Calcite ps after ikaite, Henrietta, Tasmania, Australia

    GLENDONITE, Calcite ps after ikaite, Henrietta, Tasmania, Australia
    $85.00
  • GLENDONITE, Calcite ps after ikaite, Henrietta, Tasmania, Australia

    GLENDONITE, Calcite ps after ikaite, Henrietta, Tasmania, Australia

    GLENDONITE, Calcite ps after ikaite, Henrietta, Tasmania, Australia
    $65.00
  • MALACHITE, WULFENITE Rum Jungle, Northern Territory Australia (miniature)

    MALACHITE, WULFENITE Rum Jungle, Northern Territory Australia (miniature)

    MALACHITE, WULFENITE Rum Jungle, Northern Territory Australia (miniature)
    $23.00
  • MALACHITE, WULFENITE Rum Jungle, Northern Territory Australia (miniature)

    MALACHITE, WULFENITE Rum Jungle, Northern Territory Australia (miniature)

    MALACHITE, WULFENITE Rum Jungle, Northern Territory Australia (miniature)
    $23.00
  • MALACHITE, WULFENITE Rum Jungle, Northern Territory Australia (miniature)

    MALACHITE, WULFENITE Rum Jungle, Northern Territory Australia (miniature)

    MALACHITE, WULFENITE Rum Jungle, Northern Territory Australia (miniature)
    $13.00
  • MALACHITE, WULFENITE Rum Jungle, Northern Territory Australia (miniature)

    MALACHITE, WULFENITE Rum Jungle, Northern Territory Australia (miniature)

    MALACHITE, WULFENITE Rum Jungle, Northern Territory Australia (miniature)
    $18.00
  • MALACHITE, WULFENITE Rum Jungle, Northern Territory Australia (miniature)

    MALACHITE, WULFENITE Rum Jungle, Northern Territory Australia (miniature)

    MALACHITE, WULFENITE Rum Jungle, Northern Territory Australia (miniature)
    $23.00
  • MALACHITE, WULFENITE Rum Jungle, Northern Territory Australia (miniature)

    MALACHITE, WULFENITE Rum Jungle, Northern Territory Australia (miniature)

    MALACHITE, WULFENITE Rum Jungle, Northern Territory Australia (miniature)
    $27.00