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
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Formula Tanzanite:
Ca2Al3[O/OH/SiO4/Si2O7]
Mineral class: Silicates Crystal system: rhombic Mohs scale: 6.5 - 7 Density (g/cm3): 3.26 - 3.38 Refractive index: 1.690 - 1.700 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 Name: from its country of origin, Tanzania |
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Merelani Mine / Umba Valley / Arusha / Simanjiro Distr. / Tanzania |
Größere Kartenansicht |
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Tanzanite Mineral
Origin: Merelani Mine / Umba Valley / Arusha / Simanjiro Distr. / Tanzania Photo by kind permission of © www.irocks.com |
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Tanzanite Mineral - Pleochroism
Size: 2.3 x 0.8 x 0.7 cm Origin: Merelani Mine / Umba Valley / Arusha / Simanjiro Distr. / Tanzania Photo by kind permission of © www.irocks.com |
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Tanzanite Mineral - Color enhancement by heating
A Tanzanite crystal – showing the color change on heating and the subsequent removal of the red/burgundy axis Left: Original color, right: Enhanced. Original article on this: http://www.lapigems.com/blog/post Photo by kind permission of © www.lapigems.com |
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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) |
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Tanzanite
Size: 1.77 x 1.54 x 1.20 cm Weight: 25.73 ct Origin: Merelani / Umba Valley / Arusha / Simanjiro Distr. / Tanzania Photo by kind permission of © www.paraibainternational.com |
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Tanzanite
Weight: 2.77 ct Origin: Merelani Mine / Umba Valley / Arusha / Simanjiro Distr. / Tanzania Photo by kind permission of © www.multicolour.com |
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Tanzanite Ring
Tanzanites: 2.60 ct; 0.90 x 0.71 cm, and 2 with total 0.63 ct Diamonds: 80; total 1.21 ct Gold: 18K Yellow gold Photo by kind permission of © www.africagems.com |
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Tanzanite
Weight: 9.38 ct Origin: Merelani Mine / Umba Valley / Arusha / Simanjiro Distr. / Tanzania Photo by kind permission of © www.multicolour.com |
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Tanzanite
Weight: 23.96 ct Origin: Merelani Mine / Umba Valley / Arusha / Simanjiro Distr. / Tanzania Photo by kind permission of © www.edelsteine.at |
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Tanzanite Ring
Tanzanite: 12.11 ct Origin: 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 |
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Tanzanite
Weight: 8.49 ct Origin: Merelani / Tanzania Photo by kind permission of © www.minclassics.com |
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Tanzanite Ring
Tanzanite: 12.13 ct; 1.5 x 1.5 x 1.5 cm Diamonds: 19; total 0.46 ct Gold: 14K White gold Photo by kind permission of © www.awesomegems.com |
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Tanzanite
Size: 2.12 x 2.12 x 1.55 cm Weight: 50.82 ct Origin: Merelani / Tanzania Photo by kind permission of © www.paraibainternational.com |
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Tanzanite
Size: 0.8 x 0.62 x 0.45 cm Weight: 1.24 ct Origin: Merelani / Tanzania Photo by kind permission of © www.palagems.com |
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Tanzanite Ring
Tanzanite: 4.66 ct, 1.35 x 1.02 cm, Merelani / Tanzania Gold: 18K White and yellow gold Photo by kind permission of www.africagems.com |
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Tanzanite
Size: 0.65 x 0.65 x 0.43 cm Weight: 1.19 ct Origin: Merelani / Tanzania Photo by kind permission of © www.palagems.com |
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Tanzanite
Weight: 0.32 ct Origin: Merelani Mine / Umba Valley / Arusha / Simanjiro Distr. / Tanzania Photo by kind permission of © www.irocks.com |
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Tanzanite
Weight: 2.12 ct Origin: Merelani / Tanzania Photo by kind permission of © www.thegemtrader.com |
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Tanzanite bicolor
Size: 0.74 x 0.61 cm Weight: 1.20 ct Origin: Merelani / Tanzania Photo by kind permission of © www.thegemtrader.com |
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Tanzanite bicolor
Weight: 1.13 ct Origin: Merelani / Tanzania Photo by kind permission of © www.thegemtrader.com |
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Tanzanite bicolor Mineral
Size: 5.3 x 4.8 x 1.1 cm Origin: Merelani / Tanzania Photo by kind permission of © www.collectorfinejewelry.com |
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Tanzanite bicolor Mineral
Size: 2.4 x 1.7 x 0.8 cm Origin: Merelani / Tanzania Photo by kind permission of © www.irocks.com |
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Tanzanite bicolor Mineral
Size: 1.5 x 1.3 x 0.4 cm Origin: Merelani / Tanzania Photo by kind permission of © www.collectorfinejewelry.com |
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⇐ Intro Page xxxx ⇐ Gemstones xxxx ⇐ Zoisite, Tanzanite with various colors