Unknown origin

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Showing 209–224 of 342 results

  • Sapphire

    Sapphire

    1,235 ct. | VII/C
    64712
    €700.00
  • Sapphire

    Sapphire

    1,082 ct. | IV/D
    64714
    €1,000.00
  • Sapphire

    Sapphire

    2,047 ct. | V/E
    47686
    €1,100.00
  • Sapphire

    Sapphire

    1,715 ct. | V/D
    64827-1
    €2,800.00
  • Sapphire

    Sapphire

    1,805 ct. | II/D
    64974-1
    €7,200.00
  • Sapphire - reddish brown

    Sapphire - reddish brown

    1,014 ct. | V/C
    GLA
    €600.00
  • Spessartin

    Spessartin

    18,028 ct. | VI/A
    GLA
    €4,800.00
  • Spessartite

    Spessartite

    5,051 ct. | V/A
    GLA
    €1,500.00
  • Spessartite

    Spessartite

    5,514 ct. | IV/B
    GLA
    €1,900.00
  • Spessartite

    Spessartite

    5,622 ct. | IV/C
    GLA
    €1,700.00
  • Spessartite

    Spessartite

    6,173 ct. | V/A
    GLA
    €1,900.00
  • Spessartite

    Spessartite

    6,996 ct. | V/A
    GLA
    €2,100.00
  • Spinel

    Spinel

    1,762 ct. | V/B
    GLA
    €1,000.00
  • Spinel

    Spinel

    2,205 ct. | IV/D
    GLA
    €1,100.00
  • Spinel

    Spinel

    2,392 ct. | V/C
    GLA
    €1,500.00
  • Spinel

    Spinel

    1,94 ct. | IV/B
    GLA
    €1,300.00

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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