Tanzanite

Tanzanite
Tanzanaiti, Tanzaniet, Tansaniitti, Tanzanit, Tanzanita, Tanzanitas, Tanzanitt, タンザナイト, 黝簾石, טנזניט

Commonly known rarer (so called collectors stones) very rare (rarities) relatively rare organic material

Formula Tanzanite: Ca₂Al₃[O/OH/SiO₄/Si₂O₇]
Mineral class: Silicates
Crystal system: rhombic
Mohs scale: 6.5 - 7
Density (g/cm³): 3.35
Cleavage: different
Colors: blue, violet, reddish, caused by strong trichroism. TanzaniteOne Ltd. writes: "Once cut and polished, tanzanite ranges from electric violets and pale blues to deep royals and rich indigos."
Luster: vitreous
Fluorescence: -
Pleochroism: very strong: violet - blue - brown
Largest uncut Tanzanite: 16.839 ct
Deposit: Merelani Mine / Umba Valley / Arusha / Simanjiro Distr. / Tanzania, Kenya
Discovery: 1967
1st Description: 1969

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Merelani Mine / Umba Valley / Arusha / Simanjiro Distr. / Tanzania

Größere Kartenansicht

Tanzanite Mineral

Origin: Merelani Mine / Umba Valley / Arusha / Simanjiro Distr. / Tanzania

Photo by kind permission of © www.irocks.com, Dr. Robert Lavinsky.

Tanzanite Largest ever found Tanzanite - "The Mawenzi"
Weight: 16.839 ct (more than 3 kg), 220 mm x 80 mm x 70 mm).
Origin: Merelani Mine / Block C / Umba Valley / Arusha / Simanjiro Distr. / Tanzania
(Source: TanzaniteOne Ltd. - www.tanzaniteone.com)

Tanzanite

Weight: 2.77 ct

Origin: Merelani Mine / Umba Valley / Arusha / Simanjiro Distr. / Tanzania

Photo by kind permission of © www.multicolour.com, David Weinberg.

Tanzanite

Weight: 9.38 ct

Origin: Merelani Mine / Umba Valley / Arusha / Simanjiro Distr. / Tanzania

Photo by kind permission of © www.multicolour.com, David Weinberg.

Tanzanite

Weight: 23.96 ct

Origin: Merelani Mine / Umba Valley / Arusha / Simanjiro Distr. / Tanzania

Photo by kind permission of © www.edelsteine.at, Wiener Edelsteinzentrum.

Tanzanite Ring
Weight of the Tanzanite: 12.11 ct

Origin of the Tanzanite: Merelani Mine / Umba Valley / Arusha / Simanjiro Distr. / Tanzania

Photo by kind permission of www.mnh.si.edu, Smithsonian National Museum of Natural History.
Photo: Chip Clark

Tanzanite

Weight: 0.32 ct

Origin: Merelani Mine / Umba Valley / Arusha / Simanjiro Distr. / Tanzania

Photo by kind permission of © www.irocks.com, Dr. Robert Lavinsky.

Tanzanite 2 colors

Weight: 1.13 ct

Origin: Tanzania

Photo by kind permission of © www.thegemtrader.com, Brad Payne.