Tanzania

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Showing all 16 results

  • Sapphire

    Sapphire

    2,806 ct. | VI/C
    64520
    €1,915.83
  • Tanzanite

    Tanzanite

    13,589 ct. | II/B
    GLA
    €13,209.17
  • Tanzanite

    Tanzanite

    15,371 ct. | II/A
    GLA
    €16,536.67
  • Tanzanite

    Tanzanite

    15,887 ct. | II/A
    GLA
    €14,620.83
  • Tanzanite

    Tanzanite

    16,457 ct. | II/B
    GLA
    €15,326.67
  • Tanzanite

    Tanzanite

    16,566 ct. | III/A
    GLA
    €15,225.83
  • Tanzanite

    Tanzanite

    17,194 ct. | II/A
    GLA
    €20,670.83
  • Tanzanite

    Tanzanite

    19,216 ct. | II/B
    GLA
    €20,670.83
  • Tanzanite

    Tanzanite

    19,891 ct. | II/B
    GLA
    €22,183.33
  • Tanzanite

    Tanzanite

    14,1 ct. | II/B
    GLA
    €13,713.33
  • Tanzanite

    Tanzanite

    14,42 ct. | III/B
    GLA
    €12,100.00
  • Tanzanite

    Tanzanite

    10,426 ct. | II/A
    GLA
    €10,587.50
  • Tanzanite

    Tanzanite

    11,866 ct. | II/A
    GLA
    €12,100.00
  • Tanzanite

    Tanzanite

    13,775 ct. | II/A
    GLA
    €15,125.00
  • Tanzanite

    Tanzanite

    14,929 ct. | II/A
    63527-1
    €16,133.33
  • Tanzanite pair

    Tanzanite pair

    19,152 ct. | III/B
    GLA
    €14,217.50

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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