Tanzanite

Item Number: 2024-0329

Sold out

€2,900.00

incl. 20% VAT

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Details

Weight:

6,099 ct.

Color Quality:

good (V)

Purity:

Eye clean (A)

Color:

blue

Shape:

Round

Dimensions:

10,51-10,61 mm x mm x 7,51 mm

Origin:

Unknown origin

Treatment:

Untreated

Certificate:

GLA60597-1

Item Number:

2024-0329

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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