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Indicolite

Item Number: IND-GREBLU-2021-188

€550,00

incl. VAT

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Details

Price:
550,00 €
Weight:
2,543 ct.
Color:
greenish blue
Shape:
Cushion
Dimensions:
9,96 mm x 6,94 mm x 4,63 mm
Color Quality:
good (IV)
Purity:
small inclusions (D)
Origin:
Unknown origin
Treatment:
not detectable
Certificate:
GLA49703
Item Number:
IND-GREBLU-2021-188

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facts

properties of tourmaline

  • Separate mineralogical group with many varieties
  • Hardness grade 7 – 7,5
  • Chemical formula: XY3Z6(T6O18)(BO3)3V3W(V, W, X, Y, Z stand for different possible elements)
  • Includes all colors
  • Colored by different metal oxides
  • Specific gravity 2.8 – 3.3 g/cm3

origin

  • Brasilia
  • Madagascar
  • Pakistan
  • Various locations in Europe
  • Mozambique
  • Namibia
  • Nigeria

worth knowing

  • Oldest known locality in modern trade: Brazil
  • Occurs in all colors
  • Forms beautiful crystals with very good crystal endings
  • Various esoteric and healing meanings
  • Also large crystals and large cut stones possible
  • The locality Pakistan was discovered only around 2010

investment in tourmaline

  • Still undervalued compared to other gemstones.
  • Exception: the Paraiba tourmaline, which can be more expensive than sapphire
  • Stones should be at least 5 ct in weight, except for Paraiba
  • Larger stones have higher appreciation
  • Experts calculate 6 – 8% increase in value per year
  • Beautiful, pure stones with clear colors are preferable

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