Round

Your gemstone search

  • Bastnäsite

    Bastnäsite

    2,773 ct. | IV/C
    GLA
    €600.00
  • Blue Sapphire

    Blue Sapphire

    0,719 ct. | V/D
    GLA
    €500.00
  • Blue Sapphire

    Blue Sapphire

    1,527 ct. | VI/D
    GLA
    €1,000.00
  • Blue Sapphire

    Blue Sapphire

    1,652 ct. | V/B
    GLA
    €2,500.00
  • Colorchange Sapphire

    Colorchange Sapphire

    2,205 ct. | VI/C
    GLA
    €1,400.00
  • Dematoid

    Dematoid

    2,738 ct. | V/F
    GLA
    €2,300.00
  • Dematoid

    Dematoid

    3,146 ct. | V/E
    GLA
    €3,300.00
  • Malaya-Garnet

    Malaya-Garnet

    3,174 ct. | IV/B
    GLA
    €800.00
  • Peridot

    Peridot

    7,695 ct. | III/C
    GLA
    €2,600.00
  • Pinksapphire

    Pinksapphire

    0,782 ct. | IV/C
    GLA
    €600.00
  • Pinksapphire

    Pinksapphire

    1,053 ct. | V/C
    GLA
    €800.00
  • Pinksapphire

    Pinksapphire

    1,221 ct. | IV/E
    GLA
    €500.00
  • Purplesapphire

    Purplesapphire

    1,021 ct. | V/E
    GLA
    €500.00
  • Sapphire

    Sapphire

    3,064 ct. | VI/B
    GLA
    €5,400.00
  • Sapphire

    Sapphire

    10,235 ct. | I/C
    GLA
    €45,000.00
  • Spinel

    Spinel

    1,396 ct. | V/C
    GLA
    €700.00

Facts

properties of spinel

  • Own mineralogical group
  • Hardness grade 8
  • Chemical formula: MgAl2O4
  • Includes almost all colors
  • Colored by different metal oxides
  • High density of the mineral: 3.6 - 4.1

origin

  • Burma
  • Vietnam
  • Tadschikistan
  • Sri Lanka
  • Afghanistan

worth knowing

  • Oldest known locality: Burma
  • Has been confused with ruby for a long time
  • Some of the most important "rubies" in the world are therefore spinels
  • Spinel can be distinguished from ruby by its crystal system and refraction of light
  • Gives courage and confidence
  • Most important place of discovery is still Burma

investment in spinel

  • Outsider in the investment field, which will quickly increase in value
  • Rare, rapidly increasing in value
  • Stones should have at least 2 ct weight
  • Larger, luminous stones have higher increase in value
  • Experts expect 8 - 10% increase in value per year
  • Beautiful sparkling spinels are to be preferred
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