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 577–592 of 639 results

  • Topaz

    Topaz

    85,770 ct. | VIII/A
    GLA
    €2,600.00
  • Topaz

    Topaz

    86,318 ct. | VII/B
    GLA
    €2,400.00
  • Tourmaline

    Tourmaline

    4,159 ct. | IV/C
    GLA
    €900.00
  • Tourmaline

    Tourmaline

    4,742 ct. | IV/C
    GLA
    €1,000.00
  • Tourmaline

    Tourmaline

    5,035 ct. | IV/C
    GLA
    €1,000.00
  • Tourmaline

    Tourmaline

    5,277 ct. | IV/C
    GLA
    €1,500.00
  • Tourmaline

    Tourmaline

    5,463 ct. | IV/C
    GLA
    €1,300.00
  • Tourmaline

    Tourmaline

    5,784 ct. | V/B
    GLA
    €1,500.00
  • Tourmaline

    Tourmaline

    6,245 ct. | IV/B
    GLA
    €1,600.00
  • Tourmaline

    Tourmaline

    6,441 ct. | IV/A
    GLA
    €2,200.00
  • Tourmaline

    Tourmaline

    7,247 ct. | V/C
    GLA
    €1,700.00
  • Tourmaline

    Tourmaline

    7,537 ct. | IV/C
    GLA
    €2,300.00
  • Tourmaline

    Tourmaline

    8,859 ct. | V/A
    GLA
    €2,700.00
  • Tourmaline

    Tourmaline

    10,417 ct. | V/B
    GLA
    €2,100.00
  • Tourmaline

    Tourmaline

    11,516 ct. | III/C
    GLA
    €3,200.00
  • Tourmaline

    Tourmaline

    12,282 ct. | V/A
    GLA
    €3,700.00

Facts

properties of tourmaline

  • Separate mineralogical group with many varieties
  • Hardness grade 7 - 7,5
  • Chemical formula: XY3Z6(T6O18)(BO3)3V3W(V, W, X, Y, Z stand for different possible elements)
  • Includes all colors
  • Colored by different metal oxides
  • Specific gravity 2.8 - 3.3 g/cm3

origin

  • Brasilia
  • Madagascar
  • Pakistan
  • Various locations in Europe
  • Mozambique
  • Namibia
  • Nigeria

worth knowing

  • Oldest known locality in modern trade: Brazil
  • Occurs in all colors
  • Forms beautiful crystals with very good crystal endings
  • Various esoteric and healing meanings
  • Also large crystals and large cut stones possible
  • The locality Pakistan was discovered only around 2010

investment in tourmaline

  • Still undervalued compared to other gemstones.
  • Exception: the Paraiba tourmaline, which can be more expensive than sapphire
  • Stones should be at least 5 ct in weight, except for Paraiba
  • Larger stones have higher appreciation
  • Experts calculate 6 - 8% increase in value per year
  • Beautiful, pure stones with clear colors are preferable
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