Untreated

Your gemstone search

Showing 353–368 of 446 results

  • Sapphire - reddish brown

    Sapphire - reddish brown

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

    Spinel

    2,519 ct. | VI/B
    GLA
    €1,200.00
  • Spinel

    Spinel

    2,182 ct. | VI/B
    GLA
    €1,100.00
  • Spinel

    Spinel

    1,469 ct. | VI/B
    GLA
    €600.00
  • Spinel

    Spinel

    1,395 ct. | V/C
    GLA
    €700.00
  • Spinel

    Spinel

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

    Spinel

    1,232 ct. | V/C
    GLA
    €600.00
  • Spinel

    Spinel

    1,190 ct. | V/C
    GLA
    €600.00
  • Spinel

    Spinel

    1,192 ct. | V/C
    GLA
    €550.00
  • Spinel

    Spinel

    6,988 ct. | V/C
    GLA
    €1,600.00
  • Spinel

    Spinel

    3,847 ct. | VII/C
    GLA
    €1,700.00
  • Spinel

    Spinel

    2,316 ct. | VI/C
    GLA
    €600.00

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
close
[cleverreach form=219969]