Tanzania

Buy untreated, natural colored, investment-grade gemstones in our online store. All our gemstones available for purchase are accompanied by certificates from internationally recognized gemological institutes.

You can easily buy our gems directly online, or submit inquiries regarding specific stones.

Your gemstone search

Showing 1–16 of 37 results

  • Tanzanite

    11,721 ct. | IV/B
    GLA
    €11,250.00

  • Tanzanite

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

  • Tanzanite

    13,619 ct. | III/A
    GLA
    €11,083.33

  • Tanzanite

    13,653 ct. | III/B
    GLA
    €9,333.33

  • Tanzanite

    14,044 ct. | II/A
    GLA
    €11,250.00

  • Tanzanite

    14,539 ct. | II/A
    GLA
    €11,833.33

  • Tanzanite

    14,545 ct. | II/A
    GLA
    €13,750.00

  • Tanzanite

    14,786 ct. | III/A
    GLA
    €11,833.33

  • Tanzanite

    15,371 ct. | II/A
    GLA
    €12,333.33

  • Tanzanite

    15,597 ct. | III/A
    GLA
    €11,083.33

  • Tanzanite

    15,649 ct. | II/A
    GLA
    €14,833.33

  • Tanzanite

    15,744 ct. | III/A
    GLA
    €10,833.33

  • Tanzanite

    15,887 ct. | II/A
    GLA
    €11,666.67

  • Tanzanite

    15,897 ct. | III/A
    GLA
    €10,416.67

  • Tanzanite

    15,973 ct. | II/A
    GLA GII
    €15,000.00

  • Tanzanite

    16,141 ct. | II/B
    GLA
    €14,583.33

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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