Main centres: | 1-3 business days |
Regional areas: | 3-4 business days |
Remote areas: | 3-5 business days |
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Rarity of Tanzanite Tanzanite is rare because of the single source of mining and gem grade colors, darkness, and sizes over 2 cts. are not common. The rarity of the supply slowly became an issue in the eyes of manufacturers, retailers and consumers. Sure the rarity added to the ambiance and the mystery of the gem, but it also added to the price tag. When the mines collapsed in 1998 due to severe flooding, this added to an already slow production schedule. People realized this beautiful gem would not be around forever. Although still produced, the rarity still plays a big role in the character of tanzanite. Many feel it will not be around in years to come. We would rather appreciate it today and not look to tomorrow. The major fault block D that produces the biggest, darkest pieces is still NOT OPEN as of 2002.
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TANZANITE
TOTAL WEIGHT: 1.47CT COMBINED SIZE: 3.00MM X 4.00MM EACH NUMBER OF GEM: 7 PIECE SHAPE: OVAL COLOR: VIOLET BLUE CLARITY: EYE CLEAN TO SI ORIGIN: TANZANIA HARDNESS: 6.5 HEAT: LIGHT SPECIFIC GRAVITY: 2.3-3.4 REFRACTIVE INDEX: 1.69-1.70 CHEMICAL COMPOSITION: Ca2AI3Si3012OH CRYSTAL STRUCTURE: ORTHORHOMBIC THESE ARE AUTHENTIC TANZANITES
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