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Origin of the name tourmaline
The name tourmaline comes from the Sinhalese word "tura mali" from. Translated it means "stone with mixed colors'.
An old legend of Egypt says that a tourmaline up on the long road from the interior of the earth to the sun over a rainbow was hiked. On the way he had taken all the colors of the rainbow. Therefore it is called even today the "gemstone of the rainbow".
Origin and occurrence of tourmaline
Tourmalines are found almost everywhere in the world.
The oldest known localities are in Asia. The most important deposits are in Brazil, Sri Lanka and SAED and Southwest Africa.
Other deposits are in Tanzania, Nigeria, Kenya, Zimbabwe, Mozambique and Madagascar, Afghanistan and Pakistan. Tourmalines are found also in the United States, primarily in the states of California and Maine.
It was only in 1703 brought the first Dutch tourmalines from faraway Ceylon to Europe. Then another 200 years passed before they could set up a chemical formula for this complex composite mineral.
Made a name for himself next to the green tourmalines from Tanzania through its emerald &auhm; similar color.
One day, the largest crystal was discovered in the basement Usakos in Namibia.
The colors of tourmaline
When Tourmaline almost all colors of the rainbow are represented in natural deposits.
It gives him more than 50 shades from colorless to pink, black to red, yellow, brown, green and blue to.
A single crystal can often have multiple colors.
Depending on the viewing direction, the color is different or varying intensity, the specialist calls this pleochroism.
Then there are tourmalines which change their color when switching from daylight to artificial light, and some show the light effect of a cat's eye.
Crystals are very popular so-called "melon stones" that have a green cover with a red core. Also the "marshmallow tourmalines" bright crystals with dark tip.
Chromophores are manganese, chromium, vanadium, iron and other elements, and some miracles are apparently still been saving.
Red tourmalines are called rubellite, but only if it in artificial light show the same fine ruby red as in daylight.
Blue tourmalines are called "Indicolite", yellow-brown to dark brown under the name of "dravite" known in the trade as green tourmalines verdelite hot and black tourmaline in the jargon "schorl".
Under the name "Canary Tourmaline 'tourmalines are of vivid yellow color from Malawi in trade.
Two Colored stones bicolor tourmalines are hot while multicolored multicolor tourmaline.
Only in 1987 were in the Mina da Batalha discovered in the Brazilian state of Paraiba fantastically beautiful, intense blue and blue-green tourmalines.
Traces of copper, as researchers found soon. The cause for the incomparable color
Paraiba tourmalines have understandably its price. But who has ever seen, they will never forget and want to own at least one of them.
The biggest blue Paraiba tourmalines have a weight of up to eight, the green even up to 20 carats.
At tourmalines are often seen the so-called pleochroism, which means that a crystal has different colors depending on the viewing direction. Due to different color depth in the different directions of the crystal
Good Gemstone images are available at www.Minerals.ch, so you can just order a little bit.
