Verdelite or green tourmaline can resemble emerald. Indicolite or blue tourmaline can appear purplish blue or bluish green, depending on the amount of iron and titanium. However, if the color becomes less vibrant under different light sources, it may be called pink tourmaline. Rubellite or red tourmaline is caused by manganese. It’s named for the Drave District of Carinthina (now Slovenia) where this stone is found.Įlbaite offers the widest range of gem-quality tourmaline colors, due to lithium traces combined with other coloring elements. This variety makes up 95 percent of all tourmaline, though most of it isn’t gemstone-quality.ĭravite or brown tourmaline is rich in magnesium, which causes colors ranging from brown to yellow.
Certain trace elements produce distinct colors, and many resulting varieties have their own names.īlack tourmaline, known as “schorl” is rich in iron, which causes dark shades from deep brown to bluish-black. Tourmaline is not one mineral, but a fairly complex group of minerals with different chemical compositions and physical properties. The name “tourmaline” comes from the Sinhalese words tura mali, which mean “stone of mixed colors.” As its name implies, tourmaline stands apart from other gemstones with its broad spectrum of colors in every shade of the rainbow.
The Practical Guide to Jewelry Appraising.The History of the Diamond as an Engagement Ring.History of the Diamond as the April Birthstone.Verify Your AGS Laboratories Diamond Grading Report.
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