Gemstone Online Shop

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.

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The photos presented here by The Natural Gem show each gemstone as it is. The photos are not post-processed, color changed and the gemstones are not optically optimized in their purity.

Showing 561–576 of 639 results

  • Tanzanite

    Tanzanite

    13,589 ct. | II/B
    GLA
    €13,100.00
  • Tanzanite

    Tanzanite

    15,371 ct. | II/A
    GLA
    €16,400.00
  • Tanzanite

    Tanzanite

    15,887 ct. | II/A
    GLA
    €14,500.00
  • Tanzanite

    Tanzanite

    16,457 ct. | II/B
    GLA
    €15,200.00
  • Tanzanite

    Tanzanite

    16,566 ct. | III/A
    GLA
    €15,100.00
  • Tanzanite

    Tanzanite

    17,194 ct. | II/A
    GLA
    €20,500.00
  • Tanzanite

    Tanzanite

    19,216 ct. | II/B
    GLA
    €20,500.00
  • Tanzanite

    Tanzanite

    19,891 ct. | II/B
    GLA
    €22,000.00
  • Tanzanite

    Tanzanite

    14,1 ct. | II/B
    GLA
    €13,600.00
  • Tanzanite

    Tanzanite

    14,42 ct. | III/B
    GLA
    €12,000.00
  • Tanzanite

    Tanzanite

    19,235 ct. | IV/A
    GLA
    €18,000.00
  • Tanzanite

    Tanzanite

    10,426 ct. | II/A
    GLA
    €10,500.00
  • Tanzanite

    Tanzanite

    11,866 ct. | II/A
    GLA
    €12,000.00
  • Tanzanite

    Tanzanite

    13,775 ct. | II/A
    GLA
    €15,000.00
  • Tanzanite

    Tanzanite

    14,929 ct. | II/A
    63527-1
    €16,000.00
  • Tanzanite pair

    Tanzanite pair

    19,152 ct. | III/B
    GLA
    €14,100.00

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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