Tanzania

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  • Tanzanite

    Tanzanite

    13,589 ct. | II/B
    GLA
    €10,916.67
  • Tanzanite

    Tanzanite

    15,371 ct. | II/A
    GLA
    €13,666.67
  • Tanzanite

    Tanzanite

    15,887 ct. | II/A
    GLA
    €12,083.33
  • Tanzanite

    Tanzanite

    16,457 ct. | II/B
    GLA
    €12,666.67
  • Tanzanite

    Tanzanite

    16,566 ct. | III/A
    GLA
    €12,583.33
  • Tanzanite

    Tanzanite

    17,052 ct. | III/B
    GLA
    €11,500.00
  • Tanzanite

    Tanzanite

    17,194 ct. | II/A
    GLA
    €17,083.33
  • Tanzanite

    Tanzanite

    18,589 ct. | III/A
    GLA
    €13,750.00
  • Tanzanite

    Tanzanite

    19,216 ct. | II/B
    GLA
    €17,083.33
  • Tanzanite

    Tanzanite

    19,891 ct. | II/B
    GLA
    €18,333.33
  • Tanzanite

    Tanzanite

    14,1 ct. | II/B
    GLA
    €11,333.33
  • Tanzanite

    Tanzanite

    14,42 ct. | III/B
    GLA
    €10,000.00
  • Tanzanite

    Tanzanite

    10,426 ct. | II/A
    GLA
    €8,750.00
  • Tanzanite

    Tanzanite

    11,866 ct. | II/A
    GLA
    €10,000.00
  • Tanzanite

    Tanzanite

    13,775 ct. | II/A
    GLA
    €12,500.00
  • Tanzanite

    Tanzanite

    14,929 ct. | II/A
    63527-1
    €13,333.33

Facts

properties of tanzanite

  • Belongs mineralogically to zoisite
  • Hardness grade 6,5-7
  • Chemical formula: Ca2Al3(SiO4)3OH
  • Includes the colors blue, violet and brown
  • By heating it develops its famous blue color
  • Density from 3,29 - 3,4

origin

worth knowing

  • Only place of discovery: Tanzania
  • Tanzania locality was discovered in 1967
  • Was mineralogically known as "Zoisite" for a long time
  • Became known worldwide through the movie "Titanic"

Tanzanite as an investment

  • Rare, strongly increasing in value
  • finds become less, because there is only 1 mining area
  • rather bigger stones are preferable
  • Larger stones have higher increase in value
  • stones with deep blue color are to be preferred
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