The gemstone Tourmaline is the official birthstone for October as adopted by the American National Association of Jewelers in 1912. It also the tradidional birthstone for October, the stone for the Zodiac sign of Leo, and the accepted gem for the 8th wedding anniversary.
The name Tourmaline comes from the Sinhalese (Sri Lanka) word tura mali which translates as the stone of mixed colors. These stones are 7 to 7.5 on the Mohs’ scale of hardness.
Tourmaline is available in a wide variety of colors from black to bluish-black, dark brown, yellow, medium brown, blue to neon blue, lime to dark forrest green, red and reddish purple, yellow, pink, and colourless.
Bi-colored and multicoloured tourmalines may be green at one end and pink at the other, watermelon tourmalines are green on the outside and pink on the inside. Some stones are dichroic meaning they appear to change color when viewed from different angles.
The most expensive tourmalines are the blue indicolite, green verdelite and pink rubellite.
Cat's Eye Tourmaline exhibits a "cat;s eye" effect similar to what is commonly seen in tiger's eye cabochons. Chrome Tourmaline is colored by chromium resulting in a beautiful green stone that is often confused with emerald or the tsavorite garnet. Indicolite is a dark blueish black stone. The Paraiba tourmaline is a bright neon-blue and Rubellite is a deep reddish purple stone. Schorl is the name given to black tourmalines which are the most commonly found tourmalines.
The name Tourmaline comes from the Sinhalese (Sri Lanka) word tura mali which translates as the stone of mixed colors. These stones are 7 to 7.5 on the Mohs’ scale of hardness.
Tourmaline is available in a wide variety of colors from black to bluish-black, dark brown, yellow, medium brown, blue to neon blue, lime to dark forrest green, red and reddish purple, yellow, pink, and colourless.
Bi-colored and multicoloured tourmalines may be green at one end and pink at the other, watermelon tourmalines are green on the outside and pink on the inside. Some stones are dichroic meaning they appear to change color when viewed from different angles.
The most expensive tourmalines are the blue indicolite, green verdelite and pink rubellite.
Cat's Eye Tourmaline exhibits a "cat;s eye" effect similar to what is commonly seen in tiger's eye cabochons. Chrome Tourmaline is colored by chromium resulting in a beautiful green stone that is often confused with emerald or the tsavorite garnet. Indicolite is a dark blueish black stone. The Paraiba tourmaline is a bright neon-blue and Rubellite is a deep reddish purple stone. Schorl is the name given to black tourmalines which are the most commonly found tourmalines.
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