Pear

Your gemstone search

Showing 33–38 of 38 results

  • Spessartite

    Spessartite

    5,622 ct. | IV/C
    GLA
    S$2,449.84
  • Spinel

    Spinel

    1,94 ct. | IV/B
    GLA
    S$1,873.41
  • Tanzanite

    Tanzanite

    19,891 ct. | II/B
    GLA
    S$31,703.78
  • Tanzanite

    Tanzanite

    15,371 ct. | II/A
    GLA
    S$23,633.73
  • Tanzanite

    Tanzanite

    15,597 ct. | III/A
    GLA
    S$19,166.38
  • Tanzanite

    Tanzanite

    11,721 ct. | IV/B
    GLA
    S$19,454.59

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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