• <span>Tansanit_18.088_GLA49955_18.600</span>
  • <span>TAN-18.088-Oval-GLA49955-18.600_000001</span>

Tanzanite

Item Number: 2020-0168

18.600,00

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Details

Price:
18.600,00
Weight:
18,088 ct.
Color:
violet-blue
Shape:
Oval
Dimensions:
17,78 mm x 12,94 mm x 10,2 mm
Color Quality:
very good (II)
Purity:
smallest inclusions (B)
Origin:
Tanzania
Treatment:
not detectable
Certificate:
GLA49955
Item Number:
2020-0168

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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