| Gemstone Chart |
 Natural Tanzanite
Tanzanite is a rare gem which has been celebrated as one of the most exciting finds of the 20th century. Manuel D¡¯Souza discovered the gem in 1967 in Tanzania. Because tanzanite is relatively soft, it is not usually set in necklaces and earrings, so the tiara is truly a rarity.
Color: Blue, Blue Purple, Green, Pink.
Categories: semi-precious stone
Chemical Composition: Ca2(Al,OH)Al2(SIO4)
Crystal Group: Orthorhombic
Refractive Index: 1.688 - 1.707
Hardness: 6-7
Density: 3.30 (+.10, -.10)
Occurrence: Tanzania
|  Natural Tsavorite
Tsavorite is the name given to the rich green variety of grossular garnet. Its home is the East-African bushland along the border between Kenya and Tanzania. The shining green tsavorite is a young gemstone discovered in 1967 with a very long geological history.
Color: Green
Categories: semi-precious stone
Chemical Composition: Ca3Al2(SiO4)3
Crystal Group: Cubic
Refractive Index: 1.735 (+.015, -.035)
Hardness: 7
Density: 3.61(-.27, +.12)
Occurrence: Kenya, Tanzania, Madagascar
|
|
|Register|Sign in|Customization
+'/&media=https://www.etoolsage.com/../images/eTools.gif'+'&description='+encodeURIComponent(document.title),'_blank','toolbar=yes, location=yes, directories=no, status=no, menubar=yes, scrollbars=yes, resizable=no, copyhistory=yes, width=600, height=450,top=100,left=350');void(0) "Pinterest")
