Tanzanite is an extremely rare gemstone and found in only one place on earth, near Mt. Kilimanjaro in Tanzania and is a relatively recent discovery. This blue variety of zoisite was named for Tanzania, the country where it was discovered, by Tiffany & Co.
Tanzanite crystals show different colors depending on viewing direction, so cutters are able to determine whether the stone will be pure blue or a blue with a purple hue depending on how it is cut.
Tanzanite is the Birthstone for December
REFRACTIVE INDEX: 1.691 to 1.700
SPECIFIC GRAVITY: 3.35
MOHS HARDNESS: 6 to 7
5x Cambodian Blue Sapphire 2.05 Carats
4 X Blue Zircon 7.3 Carats
4x round cut Blue Zircon
Blue Zircon pair 2.3 Carats
10.7 carat Amethyst
4 x Blue Zircon round Cut 3.65 Carats
4x Sapphires 1.9 Carats
13.25 Carat Blue Zircon