| Gemstone Chart |
 Natural Taaffeite
The chemical formula of mineral Taaffeite is indicated by BeMgAl4O8 or Beryllium Magnesium Aluminum Oxide. Taaffeite actually belongs to the Oxides and Hydroxides mineral class. Taaffeite is one of the beautiful and Rarest gems in the world.
Color: Mauve, reddish violet, brownish-purple, pink, red, blue.
Categories: semi-precious stone
Chemical Composition: Beryllium magnesium aluminate wi
Crystal Group: Hexagonal
Refractive Index: 1.71-1.72.
Hardness: 8 - 8.5
Density: 3.60 - 3.71
Occurrence: Tunduru, Tanzania; Sri Lanka
|  Natural Tourmaline
Tourmaline is actually a group of several different minerals which have similar crystal structures, but complex and variable chemical formulas. Tourmaline is the most varicolored of all gemstones. It occurs in all colors, but red, green, and multicolored are its most famous gem colors.
Color: blue, bluish green, green, greenish blue, green-blue or blue-green, greenish yellow, orangy red, red, red-orange or orange-red, red-purple or purple-red, slightly purplish red, slightly yellowish green, strongly purplish red, strongly yellowish green, very slightly bluish green, yellowish green, yellow-green or green-yellow, colorless, brown, pink
Categories: semi-precious stone
Chemical Composition: (NaCa)(LI,MgFe,Al)9B3Si6(O,OH)31
Crystal Group: Hexagonal
Refractive Index: 1.624(+.005, -.005) - 1.644(+.006, -.006)
Hardness: 7-7.5
Density: 3.06 (.05, +.15)
Occurrence: Brazil, East Africa, Nigeria, Madagascar, U.S.A.
|  Natural Zircon
Zircon is a mineral belonging to the group of nesosilicates. It is one of the heaviest gemstones, which means that it will look smaller than other varieties of the same weight. Zircon occurs in a wide range of colours,the most popular colour is blue zircon. The wide variety of colours of zircon, its rarity, and its relatively low cost make it a popular collector's stone.
Color: Brown, blue, red, orange, white, green
Categories: semi-precious stone
Chemical Composition: ZrSiO4
Crystal Group: Tetragonal
Refractive Index: 1.780-1.984
Hardness: 7.5
Density: 4.00-4.73
Occurrence: Ceylon, Burma,France, Norway, East Africa,Australia, SE Asia.
|
|
|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")
