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Tanzanite

Item Number: TAN-2020-25

€6.400,00

incl. VAT

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Details

Price:
6.400,00 €
Weight:
7,905 ct.
Color:
violet-blue
Shape:
Octagon
Dimensions:
15,13 mm x 10,35 mm x 5,86 mm
Color Quality:
very good (III)
Purity:
Eye clean (A)
Origin:
Tanzania
Treatment:
not detectable
Certificate:
GLA50112 GII
Item Number:
TAN-2020-25

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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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