Tanzanite

Item Number: 2024-0166

In stock

€18,000.00

incl. 20% VAT

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Details

Weight:

19,235 ct.

Color Quality:

good (IV)

Purity:

Eye clean (A)

Color:

blue

Shape:

Octagon

Dimensions:

15,16 mm x 13,08 mm x 10,95 mm

Origin:

Unknown origin

Treatment:

Untreated

Certificate:

GLA60373-1

Item Number:

2024-0166

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

Tansania

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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