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 593–608 of 639 results

  • Tourmaline

    Tourmaline

    13,471 ct. | V/A
    GLA
    €4,600.00
  • Tourmaline

    Tourmaline

    37,686 ct. | IV/A
    GLA
    €12,500.00
  • Tourmaline

    Tourmaline

    4,28 ct. | V/D
    GLA
    €900.00
  • Tourmaline

    Tourmaline

    6,06 ct. | V/D
    GLA
    €1,000.00
  • Tourmaline

    Tourmaline

    8,067 ct. | V/C
    GLA
    €2,200.00
  • Tourmaline

    Tourmaline

    3,524 ct. | VI/C
    GLA
    €500.00
  • Tourmaline

    Tourmaline

    4,731 ct. | VI/C
    GLA
    €1,100.00
  • Tourmaline

    Tourmaline

    29,481 ct. | VI/B
    GLA
    €5,700.00
  • Tourmaline

    Tourmaline

    7,029 ct. | VI/C
    GLA
    €1,600.00
  • Tourmaline

    Tourmaline

    9,188 ct. | V/C
    GLA
    €2,100.00
  • Tourmaline

    Tourmaline

    4,192 ct. | VI/C
    GLA
    €900.00
  • Tourmaline

    Tourmaline

    9,065 ct. | VIII/D
    GLA
    €1,000.00
  • Tourmaline

    Tourmaline

    3,701 ct. | VII/B
    GLA
    €500.00
  • Tourmaline

    Tourmaline

    3,950 ct. | VII/B
    GLA
    €500.00
  • Tourmaline

    Tourmaline

    4,956 ct. | VI/D
    GLA
    €800.00
  • Tourmaline

    Tourmaline

    4,981 ct. | VI/C
    GLA
    €1,000.00

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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