Trillion

Your gemstone search

Showing all 8 results

  • Chrome Tourmaline

    Chrome Tourmaline

    1,829 ct. | III/C
    GLA
    €800.00
  • Pinksapphire

    Pinksapphire

    1,191 ct. | V/D
    GLA
    €1,000.00
  • Purplesapphire

    Purplesapphire

    2,217 ct. | V/E
    GLA
    €700.00
  • Rubellite

    Rubellite

    7,007 ct. | III/D
    GLA
    €3,300.00
  • Spinel

    Spinel

    1,794 ct. | IV/B
    GLA
    €1,400.00
  • Spinel

    Spinel

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

    Tanzanite

    15,649 ct. | II/A
    GLA
    €20,000.00
  • Tanzanite

    Tanzanite

    17,194 ct. | II/A
    GLA
    €20,500.00

Facts

properties of tanzanite

  • Belongs mineralogically to zoisite
  • Hardness grade 6,5-7
  • Chemical formula: Ca2Al3(SiO4)3OH
  • Includes the colors blue, violet and brown
  • By heating it develops its famous blue color
  • Density from 3,29 - 3,4

origin

worth knowing

  • Only place of discovery: Tanzania
  • Tanzania locality was discovered in 1967
  • Was mineralogically known as "Zoisite" for a long time
  • Became known worldwide through the movie "Titanic"

Tanzanite as an investment

  • Rare, strongly increasing in value
  • finds become less, because there is only 1 mining area
  • rather bigger stones are preferable
  • Larger stones have higher increase in value
  • stones with deep blue color are to be preferred
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